Search tips
Search criteria 


Logo of brheartjLink to Publisher's site
Br Heart J. 1975 November; 37(11): 1150–1155.
PMCID: PMC482932

An atrionodal and nodo-Hisian gap phenomenon.


Two cases of the gap phenomenon are presented. The first was an example of a gap between the atrium and the AV node. In the second the gap was at the nodo-Hisian junction. At a critical H1H2 interval splitting of the premature His potential occurred. A decrease of the H1H2 interval led to the disappearance of the distal H2 potential and to atrioventricular block. But at even shorter coupling intervals the H1H2 interval lengthened suddenly with resumption of the AV conduction. These observations provide further evidence that the gap phenomenon has a wider spectrum than was previously thought.

Full text

Full text is available as a scanned copy of the original print version. Get a printable copy (PDF file) of the complete article (862K), or click on a page image below to browse page by page. Links to PubMed are also available for Selected References.

Selected References

These references are in PubMed. This may not be the complete list of references from this article.
  • Agha AS, Castellanos A, Jr, Wells D, Ross MD, Befeler B, Myerburg RJ. Type I, type II, and type 3 gaps in bundle-branch conduction. Circulation. 1973 Feb;47(2):325–330. [PubMed]
  • Akhtar M, Damato AN, Batsford WP, Caracta AR, Vargas G, Lau SH. Unmasking and conversion of gap phenomenon in the human heart. Circulation. 1974 Apr;49(4):624–630. [PubMed]
  • Akhtar M, Damato AN, Caracta AR, Batsford WP, Josephson ME, Lau SH. Electrophysiologic effects of atropine on atrioventricular conduction studied by His bundle electrogram. Am J Cardiol. 1974 Mar;33(3):333–343. [PubMed]
  • Bharati S, Lev M, Wu D, Denes P, Dhingra R, Rosen KM. Pathophysiologic correlations in two cases of split His bundle potentials. Circulation. 1974 Apr;49(4):615–623. [PubMed]
  • Denes P, Wu D, Dhingra RC, Chuquimia R, Rosen KM. Demonstration of dual A-V nodal pathways in patients with paroxysmal supraventricular tachycardia. Circulation. 1973 Sep;48(3):549–555. [PubMed]
  • Denes P, Wu D, Rosen KM. Demonstration of dual A-V pathways in a patient with Lown-Ganong-Levine syndrome. Chest. 1974 Mar;65(3):343–346. [PubMed]
  • Durrer D. Electrical aspects of human cardiac activity: a clinical-physiological approach to excitation and stimulation. Cardiovasc Res. 1968 Jan;2(1):1–18. [PubMed]
  • el-Sherif N, Scherlag BJ, Lazzara R, Hope R, Williams DO, Samet P. The pathophysiology of tachycardia-dependent paroxysmal atrioventricular block after acute myocardial ischemia. Experimental and clinical observations. Circulation. 1974 Sep;50(3):515–528. [PubMed]
  • Goldreyer BN, Bigger JT., Jr Spontaneous and induced reentrant tachycardia. Ann Intern Med. 1969 Jan;70(1):87–98. [PubMed]
  • Narula OS, Scherlag BJ, Samet P, Javier RP. Atrioventricular block. Localization and classification by His bundle recordings. Am J Med. 1971 Feb;50(2):146–165. [PubMed]
  • Neuss H, Schlepper M. Befunde zur supranormalen atrio-ventrikulären Erregungsleitung. Z Kardiol. 1973 Mar;62(3):267–287. [PubMed]
  • Puech P, Grolleau-Raoux R, Latour H, Cabasson J, Robin JM, Baissus C, Gilbert M. Diagnostic des blocs tronculaires hisiens par l'enregistrement endocavitaire et la stimulation du faisceau de His. Arch Mal Coeur Vaiss. 1972 Mar;65(3):315–335. [PubMed]
  • Scherlag BJ, Lau SH, Helfant RH, Berkowitz WD, Stein E, Damato AN. Catheter technique for recording His bundle activity in man. Circulation. 1969 Jan;39(1):13–18. [PubMed]
  • Varghese PJ, Elizari MV, Lau SH, Damato AN. His bundle electrograms of dog. Correlation with intracellular recordings. Circulation. 1973 Oct;48(4):753–760. [PubMed]
  • Wit AL, Damato AN, Weiss MB, Steiner C. Phenomenon of the gap in atrioventricular conduction in the human heart. Circ Res. 1970 Nov;27(5):679–689. [PubMed]
  • Wit AL, Weiss MB, Berkowitz WD, Rosen KM, Steiner C, Damato AN. Patterns of atrioventricular conduction in the human heart. Circ Res. 1970 Sep;27(3):345–359. [PubMed]
  • Wu D, Denes P, Dhingra R, Rosen KM. Nature of the gap phenomenon in man. Circ Res. 1974 May;34(5):682–692. [PubMed]

Articles from British Heart Journal are provided here courtesy of BMJ Publishing Group