Voir la suite de cet article sur Cursus ECG
Patient
24-year-old male, asymptomatic; electrocardiogram performed as part of his professional medical visit;
Trace
Sinus rhythm with a rate of 78 bpm; fixed and short (115 ms) PR-interval; normal QRS pattern;
Exergue
Various mechanisms can explain the electrocardiographic pattern of a short PR-interval with normal QRS (without pre-excitation): accelerated nodal conduction with or without presence of specific fibers that originate from the atrium, shunt the nodal filter and terminate at the atrioventricular node or bundle of His.
This patient presents an ECG combining a short PR-interval (<120 ms) and a QRS-complex of normal duration and morphology (with no delta wave). In 1952, Lown, Ganong and Levine described a syndrome coupling this electrocardiographic pattern with the occurrence of tachycardia.