Category Archives: Cardiology
Wolff-Parkinson-White Syndrome
Background In 1930, Wolff, Parkinson, and White described a series of young patients who had a bundle branch block pattern on electrocardiography (ECG) findings, a short PR interval, and paroxysms of tachycardia.[1]
Sinus Bradycardia
Background Sinus bradycardia can be defined as a sinus rhythm with a resting heart rate of 60 beats per minute or less. However, few patients actually become symptomatic until their heart rate
Second-Degree Atrioventricular Block
Background Second-degree atrioventricular (AV) block, or second-degree heart block, is a disorder characterized by disturbance, delay, or interruption of atrial impulse conduction to the ventricles through the atrioventricular node (AVN).
Atrioventricular Nodal Reentry Tachycardia (AVNRT)
Background Atrioventricular nodal reentry tachycardia (AVNRT) is the most common type of reentrant supraventricular tachycardia (SVT). Because of the abrupt onset and termination of the reentrant SVT, the nonspecific term paroxysmal
Accelerated Idioventricular Rhythm
Background Accelerated idioventricular rhythm (AIVR) was first described by Thomas Lewis in 1910.[1] AIVR is currently defined as an enhanced ectopic ventricular rhythm with at least 3 consecutive ventricular beats, which is
