Markedly varying PR intervals during second degree atrioventricular block: possible mechanisms.
A case of second degree atrioventricular block following mitral valve replacement is presented during which varying PR intervals with sudden marked increase in PR interval in consecutive beats was seen. The electrocardiogram is discussed and various hypotheses to explain the possible electrophysiological mechanism are presented.
Senior Consultant Cardiology, Division of Cardiac Electrophysiology and Pacing, Medanta Heart Institute, Medanta-The Medicity, Gurgaon - 122001, Haryana, India. drkartikeya@hotmail.com
Kartikeya
K
Bhargava
D054537:Atrioventricular Block / Q000175:diagnosis* / Q000209:etiology* / Q000628:therapy; D005260:Female; D019918:Heart Valve Prosthesis Implantation / Q000009:adverse effects*; D006801:Humans; D008946:Mitral Valve Stenosis / Q000150:complications / Q000503:physiopathology / Q000601:surgery*; D055815:Young Adult