Second degree AV block historical perspective
Jump to navigation
Jump to search
|
Second degree AV block Microchapters |
|
Diagnosis |
|---|
|
Treatment |
|
Case Studies |
|
Second degree AV block historical perspective On the Web |
|
American Roentgen Ray Society Images of Second degree AV block historical perspective |
|
Risk calculators and risk factors for Second degree AV block historical perspective |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Ahmed Elsaiey, MBBCH [2]
Overview
Second-degree AV block was first described as a progressive delay between the atrial and ventricular contraction by Dr. Wenckebach in 1899. Dr. Mobitz then divided the second-degree AV block into two subtypes. In 1905, Dr. Hay figured out the pause following a wave was due to the failure of ventricular muscles to respond to a stimulus.
Historical perspective
- In 1899, Dr. Wenckebach described progressive delay between atrial and ventricular contraction and the eventual failure of a P wave to reach the ventricles.
- Dr. Mobitz then divided the second-degree AV block into two subtypes.
- In 1905, Dr. John Hay discovered the second degree of AV block.[1]
- Dr. Hay was examining a patient who complains of slow pulse and dyspnea on exertion for more than 2 years. Dr. Hay noticed the heart rate dropping from 80 beats to 40 beats per minute.
- Dr. Hay noted the a waves and the arterial pulse to remain stable in the beginning. However, recording pulsation several times resulted in "a" waves that were not followed by c wave. The a-c jugular wave interval was used as a measurement of AV conduction.
- Dr. Hay figured out that the pause following a wave was due to the failure of ventricular muscles to respond to a stimulus.
References
- ↑ Upshaw CB, Silverman ME (2000). "John Hay: discoverer of type II atrioventricular block". Clin Cardiol. 23 (11): 869–71. doi:10.1002/clc.4960231118. PMC 6655013 Check
|pmc=value (help). PMID 11097138.