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1.  In Memoriam: John C. Norman (1930–2014) 
Texas Heart Institute Journal  2014;41(6):569-570.
PMCID: PMC4251322
2.  Repeated Transradial Catheterization: Feasibility, Efficacy, and Safety 
Texas Heart Institute Journal  2014;41(6):575-578.
Transradial access is an alternative to the transfemoral approach in coronary interventions. It results in less access-site bleeding, shorter hospital stays, lower costs, and less pain for the patient. However, some authors have suggested that the transradial approach might lead to radial artery occlusion, which precludes repeated same-artery catheterizations. Using data from our center, we evaluated the feasibility, safety, and efficacy of repeated transradial catheterization.
We reviewed the 3,006 transradial catheterizations performed at our center from 2006 through 2009. Patients who had undergone at least one repeated transradial catheterization were identified, their cases monitored through 2012, and their baseline characteristics and other factors, including procedural sequelae, were analyzed.
Seventy-nine patients underwent repeated right radial artery catheterizations, for a total of 92 repeated procedures. Repeated access to the right radial artery was not achieved in 4 attempts (failure rate, 4.3%), because of poor pulses or the operator's inability to advance the wire. No major sequelae were noted. The average times between the 1st to 2nd, 2nd to 3rd, and 3rd to 4th catheterizations were 406, 595, and 401 days, respectively.
Our procedural success rate of 95.7% in performing repeated transradial catheterizations with no major sequelae provides support for the efficacy and safety of such procedures.
PMCID: PMC4251325  PMID: 25593518
Cardiac catheterization/methods; catheterization, peripheral/adverse effects/methods; clinical trials as topic; coronary angiography/adverse effects/methods; coronary disease/therapy; femoral artery; intraoperative complications/prevention & control; myocardial ischemia/therapy; radial artery; treatment outcome
3.  Current Use of Fractional Flow Reserve: A Nationwide Survey 
Texas Heart Institute Journal  2014;41(6):579-584.
Major medical society guidelines recommend the measurement of fractional flow reserve (FFR) as an aid in choosing percutaneous coronary intervention in patients with stable coronary artery disease. We investigated the measurement of FFR among interventionalists, analyzing operators' attributes and decision-making processes to reveal differences in their applications of FFR and the reasons for those differences. An electronic survey study of 1,089 interventionalists was performed from 2 February through 6 March 2012, yielding 255 responses. Most respondents were >45 years old (58%), worked primarily in a community hospital (59%), and performed 10 to 30 cases per month (52%). More than half (145/253, 57%) used FFR measurement in less than one third of cases, and 39 of 253 (15%) never used it. There were no differences in use of FFR by age, practice location, or angiogram volume (P >0.05 for all). Respondents used FFR measurement more frequently than intravascular ultrasonography (73% vs 60%) to help guide the decision to stent (P <0.01). Operators reported that their primary reasons for not using FFR were lack of availability (47%) and problems with reimbursement (39%). There was no difference in FFR use by operator age, practice setting, or case volume.
PMCID: PMC4251326  PMID: 25593519
Angioplasty, balloon, coronary/economics; blood flow velocity; cardiac catheterization/statistical & numerical data; cardiology/standards; coronary stenosis/therapy; fractional flow reserve, myocardial/physiology; quality-adjusted life years; questionnaires; myocardial revascularization/standards; stents/economics; task performance and analysis
4.  Aortic Valve Reconstruction with Use of Pericardial Leaflets in Adults with Bicuspid Aortic Valve Disease: Early and Midterm Outcomes 
Texas Heart Institute Journal  2014;41(6):585-591.
In this study, we retrospectively analyzed the outcomes of adults with bicuspid aortic valve (BAV) disease who underwent aortic valve reconstructive surgery (AVRS), consisting of replacement of the diseased BAV with 2 or 3 pericardial leaflets plus fixation of the sinotubular junction for accurate and constant leaflet coaptation. From December 2007 through April 2013, 135 consecutive patients (mean age, 49.2 ± 13.1 yr; 73.3% men) with symptomatic BAV disease underwent AVRS. Raphe was observed in 84 patients (62.2%), and the remaining 51 patients had pure BAV without raphe. A total of 122 patients (90.4%) underwent 3-leaflet reconstruction, and 13 (9.6%) underwent 2-leaflet reconstruction. Concomitant aortic wrapping with an artificial graft was performed in 63 patients (46.7%).
There were no in-hospital deaths and 2 late deaths (1.5%); 6 patients (4.4%) needed valve-related reoperation. The 5-year cumulative survival rate was 98% ± 1.5%, and freedom from valve-related reoperation at 5 years was 92.7% ± 3.6%. In the last available echocardiograms, aortic regurgitation was absent or trivial in 116 patients (85.9%), mild in 16 (11.9%), moderate in 2 (1.5%), and severe in one (0.7%). The mean aortic valve gradient was 10.2 ± 4.5 mmHg, and the mean aortic valve orifice area index was 1.3 ± 0.3 cm2/m2. The 3-leaflet technique resulted in lower valve gradients and greater valve areas than did the 2-leaflet technique. Thus, in patients with BAV, AVRS yielded satisfactory early and midterm results with low mortality rates and low reoperation risk after the initial procedure.
PMCID: PMC4251327  PMID: 25593520
Aortic valve/abnormalities/surgery; cardiac surgical procedures/methods; heart defects, congenital/surgery; heart valve prosthesis implantation; prosthesis design; reconstructive surgical procedures/methods; treatment outcome
5.  Good Doctors and the State of Missouri: A Connection Worth Remembering 
Texas Heart Institute Journal  2014;41(6):571-572.
PMCID: PMC4251323  PMID: 25593516
6.  Left Atrial Myxoma with versus without Cerebral Embolism: Length of Symptoms, Morphologic Characteristics, and Outcomes 
Texas Heart Institute Journal  2014;41(6):592-595.
The aim of this study was to evaluate the embolic sequelae of left atrial myxomas and their influence on diagnosis, treatment, and prognosis.
Seventy-eight patients were retrospectively investigated. According to their symptoms and neurologic-imaging findings, these patients were classified into 2 groups: embolism (15 patients, 19%) and nonembolism (63 patients, 81%). The time from the first onset of symptoms to diagnosis (that is, the duration of symptoms) was significantly longer in the embolism group than in the nonembolism group (105 ± 190 vs 23 ± 18 d; P <0.01). The myxomas were divided into 2 types on the basis of clinicopathologic findings: type 1, with an irregular or villous surface and a soft consistency, and type 2, with a smooth surface and a compact consistency. There were 42 patients with type 1 myxoma and 36 with type 2. Type 1 myxoma was more frequently found in the embolism group (12 patients, 29%) than was type 2 myxoma (3 patients, 8%). The difference was significant (P=0.04). There were 2 perioperative deaths in the nonembolism group. No recurrence of cardiac myxoma or death was recorded in either group during follow-up. In the embolism group, neurologic symptoms were relieved by surgery, and no subsequent neurologic event was reported.
Because surgical resection is highly effective in left atrial myxoma, we should strive for early diagnosis in order to shorten the duration of symptoms and to avoid worse neurologic damage in patients in whom an embolic event is the initial manifestation.
PMCID: PMC4251328  PMID: 25593521
Cerebral infarction; heart neoplasms/complications; intracranial embolism/etiology; ischemic attack, transient; myxoma, left atrial/pathology; outcomes; retrospective studies
7.  Giant Coronary Artery Aneurysms: Review and Update 
Texas Heart Institute Journal  2014;41(6):603-608.
Giant coronary artery aneurysms are rare, with a reported prevalence of 0.02% to 0.2%. Causative factors include atherosclerosis, Takayasu arteritis, congenital disorders, Kawasaki disease, and percutaneous coronary intervention. Most giant coronary artery aneurysms are asymptomatic, but some patients present with angina pectoris, sudden death, fistula formation, pericardial tamponade, compression of surrounding structures, or congestive heart failure. Clinical sequelae include thrombus formation, embolization, fistula formation, and rupture. Surgical correction is generally accepted as the preferred treatment for giant coronary artery aneurysms. We present an illustrative case of a giant 70 × 40-mm coronary artery aneurysm in a 56-year-old man who declined surgery and died one month later. In addition, we provide a review of the medical literature on giant coronary artery aneurysms.
PMCID: PMC4251331  PMID: 25593524
Angina pectoris; angina, unstable; aneurysm, false; aneurysm, dissecting/diagnosis/etiology/therapy; anticoagulants/preventive use; coronary aneurysm/diagnosis/radiography/therapy/ultrasonography; coronary angiography; dilatation, pathologic; radiography, thoracic; stents; thromboembolism; tomography, x-ray computed; ultrasonography, interventional
8.  Percutaneous Repair of Post-Myocardial Infarction Ventricular Septal Defect: Current Approaches and Future Perspectives 
Texas Heart Institute Journal  2014;41(6):613-619.
Post-myocardial infarction ventricular septal defect is a devastating complication of ST-elevation myocardial infarction. Although surgical intervention is considered the gold standard for treatment, it carries high morbidity and mortality rates. We present 2 cases that illustrate the application of percutaneous closure of a post-myocardial infarction ventricular septal defect: the first in a patient who had undergone prior surgical closure and then developed a new shunt, and the second as a bridge to definitive surgery in a critically ill patient.
PMCID: PMC4251333  PMID: 25593526
Heart rupture, post-infarction; heart septal defects, ventricular; heart septum/surgery; myocardial infarction/complications; residual leak; septal occluder device; shock, cardiogenic; treatment outcome; ventricular septal rupture
9.  Ventricular Tachycardia Associated with Radiation-Induced Cardiac Sarcoma 
Texas Heart Institute Journal  2014;41(6):620-625.
Cardiac tumors can lead to distinct electrocardiographic changes and ventricular arrhythmias. Benign and malignant cardiac tumors have been associated with ventricular tachycardia. When possible, benign tumors should be resected when ventricular arrhythmias are intractable. Chemotherapy can shrink malignant tumors and eliminate arrhythmias.
We report the case of a 52-year-old woman with breast sarcoma whom we diagnosed with myocardial metastasis after she presented with palpitations. The initial electrocardiogram revealed sinus rhythm with new right bundle branch block and ST-segment elevation in the anterior precordial leads. During telemetry, hemodynamically stable, sustained ventricular tachycardia with right ventricular localization was detected. Images showed a myocardial mass in the right ventricular free wall. Amiodarone suppressed the arrhythmia.
To our knowledge, this is the first report of ventricular tachycardia associated with radiation-induced undifferentiated sarcoma. We discuss the distinct electrocardiographic changes and ventricular arrhythmias that can be associated with cardiac tumors, and we review the relevant medical literature.
PMCID: PMC4251334  PMID: 25593527
Amiodarone/administration & dosage/adverse effects/therapeutic use; arrhythmias, cardiac/diagnosis; heart neoplasms/complications/radiotherapy/secondary; neoplasms, radiation-induced/therapy; tachycardia, ventricular/diagnosis/drug therapy/etiology/physiopathology/prevention & control
10.  Exercise-Induced Syncope in a Sedentary Woman 
Texas Heart Institute Journal  2014;41(6):631-633.
Vasovagal (neurocardiogenic) syncope, a subtype of reflex syncope, has many well-known triggers. However, we found no previous report of vasovagal exercise-induced syncope in a sedentary person. We present the case of a 35-year-old sedentary woman who experienced vasovagal syncope as she underwent an exercise stress test. Results of evaluations, including resting and stress electrocardiography and echocardiography, were normal. Her presentation is highly unusual: syncope has typically not been associated with exercise except in young athletes, people with structural heart abnormalities, or people with a prolonged QT syndrome. To our knowledge, this is the first report of vasovagal syncope associated with exercise in a sedentary patient who had normal cardiac and electrophysiologic function. We suggest possible physiologic mechanisms and diagnostic strategies.
PMCID: PMC4251336  PMID: 25593529
Cardiac output/physiology; diagnosis, differential; exercise/physiology; exercise test/adverse effects; syncope, vasovagal/diagnosis/etiology/physiopathology
11.  Ruptured Mycotic Common Femoral Artery Pseudoaneurysm: Fatal Pulmonary Embolism after Emergency Stent-Grafting in a Drug Abuser 
Texas Heart Institute Journal  2014;41(6):634-637.
The rupture of a mycotic femoral artery pseudoaneurysm in an intravenous drug abuser is a limb- and life-threatening condition that necessitates emergency intervention. Emergency stent-grafting appears to be a viable, minimally invasive alternative, or a bridge, to subsequent open surgery. Caution is required in cases of suspected concomitant deep vein thrombosis in order to minimize the possibility of massive pulmonary embolism during stent-grafting, perhaps by omitting stent-graft postdilation or by inserting an inferior vena cava filter first. We describe the emergency endovascular management, in a 60-year-old male intravenous drug abuser, of a ruptured mycotic femoral artery pseudoaneurysm, which was complicated by a fatal pulmonary embolism.
PMCID: PMC4251337  PMID: 25593530
Aneurysm, false; aneurysm, infected/surgery; aneurysm, ruptured; blood vessel prosthesis implantation; combined modality therapy; debridement; disease management; endovascular repair; femoral artery/surgery; mycosis; sequelae; substance abuse, intravenous/complications
12.  Benefits and Limitations of Multimodality Imaging in the Diagnosis of a Primary Cardiac Lymphoma 
Texas Heart Institute Journal  2014;41(6):657-659.
Primary cardiac tumors are far rarer than tumors metastatic to the heart. Angiosarcoma is the primary cardiac neoplasm most frequently detected; lymphomas constitute only 1% of primary cardiac tumors.
We present the case of a 55-year-old woman with a recently diagnosed intracardiac mass who was referred to our institution for consideration of urgent orthotopic heart transplantation. Initial images suggested an angiosarcoma; however, a biopsy specimen of the mass was diagnostic for diffuse large B-cell lymphoma. The patient underwent chemotherapy rather than surgery, and she was asymptomatic 34 months later.
We use our patient's case to discuss the benefits and limitations of multiple imaging methods in the evaluation of cardiac masses. Certain features revealed by computed tomography, cardiac magnetic resonance, and positron emission tomography can suggest a diagnosis of angiosarcoma rather than lymphoma. Cardiac magnetic resonance and positron emission tomography enable reliable distinction between benign and malignant tumors; however, the characteristics of different malignant tumors can overlap. Despite the great usefulness of multiple imaging methods for timely diagnosis, defining the extent of spread and the hemodynamic impact, and monitoring responses to treatment, we think that biopsy analysis is still warranted in order to obtain a correct histologic diagnosis in cases of suspected malignant cardiac tumors.
PMCID: PMC4251343  PMID: 25593536
Diagnostic imaging/methods; heart neoplasms/diagnosis/pathology/radiography; lymphoma/diagnosis/radiography; treatment outcome
13.  Pheochromocytoma-Induced Atrial Tachycardia Leading to Cardiogenic Shock and Cardiac Arrest: Resolution with Atrioventricular Node Ablation and Pacemaker Placement 
Texas Heart Institute Journal  2014;41(6):660-663.
Pheochromocytoma should be considered in young patients who have acute cardiac decompensation, even if they have no history of hypertension. Atrioventricular node ablation and pacemaker placement should be considered for stabilizing pheochromocytoma patients with cardiogenic shock due to atrial tachyarrhythmias.
A 38-year-old black woman presented with cardiogenic shock (left ventricular ejection fraction, <0.15) that did not respond to the placement of an intra-aortic balloon pump. A TandemHeart® Percutaneous Ventricular Assist Device was inserted emergently. After atrioventricular node ablation and placement of a temporary pacemaker, the TandemHeart was removed. Computed tomography of the abdomen revealed a pheochromocytoma. After placement of a permanent pacemaker, the patient underwent a right adrenalectomy.
This is, to our knowledge, the first reported case of pheochromocytoma-induced atrial tachyarrhythmia that led to cardiogenic shock and cardiac arrest unresolved by the placement of 2 different ventricular assist devices, but that was completely reversed by radiofrequency ablation of the atrioventricular node and the placement of a temporary pacemaker. We present the patient's clinical, laboratory, and imaging findings, and we review the relevant literature.
PMCID: PMC4251344  PMID: 25593537
Adrenal gland neoplasms/complications/diagnosis/genetics; catecholamines; pheochromocytoma/diagnosis/secretion; shock, cardiogenic/etiology; tachycardia, atrial/etiology; ventricular dysfunction, left/etiology
15.  Keeping Cool in the Operating Room 
PMCID: PMC4251350  PMID: 25593543
16.  Therapeutic Listening 
Texas Heart Institute Journal  2014;41(6):573-574.
PMCID: PMC4251324  PMID: 25593517
17.  Brachiocephalic Artery Cannulation in Proximal Aortic Surgery that Requires Circulatory Arrest 
Texas Heart Institute Journal  2014;41(6):596-600.
The brachiocephalic artery is an alternative cannulation site in the repair of ascending aortic lesions that require circulatory arrest. We evaluate the effectiveness and safety of this technique.
Proximal aortic surgery was performed in 32 patients from 2006 through 2012 via brachiocephalic artery cannulation and circulatory arrest. Twenty-four (75%) of the patients were men. The mean age was 48.69 ± 9.43 years (range, 30–68 yr). Twelve had type I dissection, 2 had type II dissection, and 18 had true aneurysms of the ascending aorta. All operations were performed through a median sternotomy. The arterial cannula was inserted through an 8-mm vascular graft anastomosed to the brachiocephalic artery in an end-to-side fashion. In dissections, the distal anastomosis was performed without clamping the aorta. The patients were cooled to 24 °C, and circulatory arrest was established. The brachiocephalic and left carotid arteries were clamped, and antegrade cerebral perfusion was started at a rate of 10 mL/kg/min. Cardiopulmonary bypass was resumed after completion of the distal anastomosis and the initiation of rewarming. The proximal anastomosis was then performed.
None of the patients sustained a major neurologic deficit, but 5 patients experienced transient postoperative agitation (<24 hr). There were 2 early deaths (6.25%), on the 3rd and the 11th postoperative days, both unrelated to the cannulation technique.
Brachiocephalic artery cannulation through a graft can be a safe and effective technique in proximal aortic surgical procedures that require circulatory arrest.
PMCID: PMC4251329  PMID: 25593522
Aneurysm, dissecting/surgery; aortic aneurysm, thoracic/surgery; brachiocephalic trunk; brain/blood supply; cannulation; cardiopulmonary bypass; catheterization/methods; circulatory arrest, deep hypothermic induced; heart arrest, induced; perfusion/methods; postoperative complications/prevention & control
18.  Single Coronary Ostium in Right Coronary Sinus: Previously Unreported “One for All” Configuration 
Texas Heart Institute Journal  2014;41(6):601-602.
We report our identification of a single coronary ostium arising from the right coronary sinus of Valsalva, in a 63-year-old woman who presented with chest pain atypical of angina. Coronary angiograms showed that the left anterior descending coronary artery arose from a right ventricular branch and that the left circumflex coronary artery arose from a right posterolateral branch. Both arteries reconstituted themselves in a backward fashion from the apex to the base of the heart—a configuration that to our knowledge has not been reported. The patient was treated conservatively and reported no chest pain 24 months later.
PMCID: PMC4251330  PMID: 25593523
Coronary angiography; coronary vessel anomalies/classification/pathology/radiography; coronary vessels/pathology
19.  Mitral Valve Surgery in 6 Patients after Failed MitraClip Therapy 
Texas Heart Institute Journal  2014;41(6):609-612.
The MitraClip percutaneous mitral valve repair system, developed as an option for percutaneous mitral repair, was clinically introduced in 2007. From 2010 through 2012, 6 of our patients underwent mitral valve surgery after MitraClip failure. Their mean age was 75 ± 7.7 years (range, 62–87 yr). Three had undergone cardiac surgery previously. In 5 of the 6 patients, mitral regurgitation recurred after initially successful MitraClip deployment and was the indication for surgery. The mean interval between MitraClip implantation and surgery was 106 ± 86 days (range, 0–238 d).
Mitral valve repair was feasible in 3 patients; the others underwent valve replacement. All the patients underwent additional cardiac procedures, because the MitraClip worsened existing conditions. Echocardiograms revealed sufficient valvular repairs. Two patients died during hospitalization, one of cerebral infarction and the other of bowel ischemia.
Mitral valve repair after failed MitraClip therapy can be complex and a surgical challenge. Careful consideration should be given to appropriate patient selection for MitraClip therapy, because the MitraClip can cause existing pathologic valvular conditions to deteriorate substantially. The interval between MitraClip failure and corrective surgery should be as short as possible. The primary indication is an issue of ongoing discussion.
PMCID: PMC4251332  PMID: 25593525
Equipment failure; heart valve prosthesis implantation/methods; mitral valve insufficiency/surgery; percutaneous coronary intervention/methods; prostheses and implants; surgical procedures, minimally invasive/adverse effects/instrumentation; time factors; treatment outcome; tricuspid valve/surgery
20.  T-Cell Prolymphocytic Leukemia with Extensive Cardiovascular Infiltrate Leading to Multiple Myocardial Infarctions and Cardiac Death 
Texas Heart Institute Journal  2014;41(6):626-630.
Lymphocytic neoplasm involving the heart is not common and usually presents with pericardial effusion or focal myocardial infiltration. Myocardial infarctions due to leukemic infiltration of the coronary arteries are rarely reported. We present the case of a 52-year-old Guatemalan man with a one-year history of untreated T-cell prolymphocytic leukemia. He was admitted to our hospital for chemotherapy and evaluation of a pulmonary cavitary lesion by wedge resection. During sedation, the patient experienced acute respiratory failure and hypovolemic shock, from which he could not be resuscitated.
Autopsy revealed that leukemic cells extensively infiltrated the aorta, myocardium, and coronary arteries. The lumina of the 3 major coronary artery branches showed 70% to 95% stenosis, with multifocal remote myocardial infarctions. Tumor cells were also detected in the lungs and other organs. The acute cardiorespiratory insufficiency secondary to leukemia—particularly the extensive infiltration of the coronary arteries and myocardium, and the multiple myocardial infarctions—eventually resulted in cardiac death.
PMCID: PMC4251335  PMID: 25593528
Aorta; autopsy; coronary arteries; heart neoplasms/secondary/etiology; leukemia, lymphoid/pathology; leukemia, T-cell prolymphocytic; myocardial infarction
21.  Necrotic Bowel Induces Takotsubo-Like Myocardial Injury 
Texas Heart Institute Journal  2014;41(6):638-640.
Although chest pain in association with ST-segment electrocardiographic deviation is often indicative of cardiac ischemia, it has also been associated with noncardiac conditions. The case of a 63-year-old woman that we report here is extraordinary because her presentation of “acute abdomen” did not appear severe enough to warrant urgent surgical intervention, whereas the chest pain and electrocardiographic changes (supported by rising troponin levels) created strong clinical suspicion of acute coronary syndrome. Was the evidence of cardiac ischemia a primary event, or was it a sequela of an acute surgical condition? Noncardiac surgical cases associated with evidence of myocardial injury can be extremely challenging from a diagnostic and management perspective. We believe that the accuracy of the clinical diagnosis is crucial to a well-considered approach.
PMCID: PMC4251338  PMID: 25593531
Abdomen, acute; bowel, necrotic; diagnosis, differential; echocardiography; electrocardiography/abnormalities; radiography, abdominal; small bowel/obstruction; takotsubo cardiomyopathy; troponin/abnormalities
22.  Percutaneous Management of RetroFlex 3 Balloon Rupture and Separation of the Edwards Sapien Delivery System 
Texas Heart Institute Journal  2014;41(6):641-644.
We report the case of an 85-year-old woman with severe aortic stenosis who underwent transcatheter aortic valve replacement with use of the Edwards Sapien® valve system. The procedure was complicated by rupture of the valve-deployment balloon, with separation and retention of the nose cone of the RetroFlex 3® delivery system in the iliac artery. Our endovascular retrieval of the equipment was successful, and we achieved access-site hemostasis by deploying a covered stent. To our knowledge, this is the first report of the endovascular retrieval of a malfunctioning delivery system during transcatheter aortic valve replacement.
PMCID: PMC4251339  PMID: 25593532
Aged, 80 and over; cardiac catheterization/adverse effects; endovascular procedures/adverse effects/instrumentation; equipment failure; heart valve prosthesis implantation/adverse effects; iliac artery/injuries; treatment outcome
23.  Anticoagulation with Bivalirudin during Deep Hypothermic Circulatory Arrest in a Patient with Heparin-Induced Thrombocytopenia 
Texas Heart Institute Journal  2014;41(6):645-648.
Heparin-induced thrombocytopenia is a well-recognized complication of anticoagulation with heparin. We present the case of a patient with recent heparin-induced thrombocytopenia who subsequently needed surgery on an emergency basis for acute type A aortic dissection. This article reports the successful use of bivalirudin, a direct thrombin inhibitor, as an alternative to heparin throughout cardiopulmonary bypass and deep hypothermic circulatory arrest. We contend that bivalirudin is a safe alternative to heparin when performing surgery for aortic dissection and should be considered as an option for use in patients who present with heparin-induced thrombocytopenia.
PMCID: PMC4251340  PMID: 25593533
Anticoagulants/adverse effects; aortic dissection; bivalirudin; blood coagulation; blood loss, surgical; cardiopulmonary bypass; circulatory arrest, deep hypothermia induced; hemofiltration; heparin/adverse effects; hirudins; thrombocytopenia/chemically induced/prevention & control
24.  Concurrent Aortic Valvular Disease and Pulmonary Sequestration: Clinical Implications 
Texas Heart Institute Journal  2014;41(6):649-652.
Pulmonary sequestration refers to segmental lung tissue that has no connection with the bronchial tree or pulmonary arteries. In adults, the clinical sequelae are usually related to infection. Patients are typically referred for sequestrectomy even when they are asymptomatic. There are no guidelines for treating patients who have pulmonary sequestration and coexisting cardiac valvular disease, in which case the venous drainage patterns of sequestra pose the additional risks of infective endocarditis and volume overload.
We present the cases of 2 adult patients—one symptomatic and one asymptomatic—who had concurrent aortic valvular disease and pulmonary sequestration, and we discuss the factors involved in our evaluation of their cardiac risk and our treatment decisions. In view of the sparse data to predict cardiac risks, we think that pulmonary sequestrectomy in adult patients with concurrent valvular conditions should be considered on a case-by-case basis.
PMCID: PMC4251341  PMID: 25593534
Abnormalities, multiple/diagnosis; bronchopulmonary sequestration/complications/diagnosis/surgery; endocarditis, bacterial/complications/etiology/pathology; heart valve diseases/etiology; lung/blood supply; treatment outcome
25.  Internal Mammary Artery Graft Dissection: A Case-Based Retrospective Study and Brief Review 
Texas Heart Institute Journal  2014;41(6):653-656.
The left internal mammary artery is the preferred graft for treating left anterior descending coronary artery disease. Dissection is a rare but grave sequela of internal mammary artery graft angiography. The available medical literature is scant, perhaps as a result of under-reporting.
We report a case in which dissection of the internal mammary artery graft occurred during diagnostic angiography, and we discuss its management. In addition, we review the available literature and provide a retrospective analysis of the data from our own catheterization laboratory. In our single-center analysis of 542 cases of selective internal mammary artery graft angiography, we found only the single case of internal mammary artery graft dissection (0.2%) that we report here. Our review of the literature revealed 7 reported cases of internal mammary artery graft dissection, 3 of which were iatrogenic. There were no identifiable risk factors for such dissection. After treatment with angioplasty and stenting, all patients had good outcomes during follow-up.
PMCID: PMC4251342  PMID: 25593535
Aneurysm, dissecting/therapy; angioplasty, balloon, coronary; coronary artery bypass; internal mammary artery-coronary artery anastomosis/adverse effects; mammary arteries/dissection/injuries/surgery; postoperative complications; dissection; stents; treatment

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