Anthony N. Damato, M.D.; Sun H. Lau, M.D.; Emanuel Stein, M.D.; Walter D. Berkowitz, M.D.; Robert D. Patton, M.D.
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The localization of block in atrioventricular conduction was determined in 15 subjects with first- second-and third-degree block by recording His-bundle (H) electrograms via a tripolar electrode catheter positioned across the tricuspid valve. The H potential was recorded as a biphasic or triphasic spike occurring within the P-R interval of the standard electrocardiogram (EKG) and between the atrial and ventricular electrograms. Measurements in milliseconds were made of the intervals from the P wave to the His (P-H interval) and from the His to the Q wave of the QRS (H-Q interval). In all subjects with first-degree heart block (congenital, acquired, and
Damato AN, Lau SH, Stein E, Berkowitz WD, Patton RD. The Study of Heart Block in Man Using His-Bundle Recordings.. Ann Intern Med. 1969;70:1075–1076. doi: 10.7326/0003-4819-70-5-1075_3
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Published: Ann Intern Med. 1969;70(5):1075-1076.
Cardiology, Rhythm Disorders and Devices.
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Print ISSN: 0003-4819 | Online ISSN: 1539-3704
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