THE electrocardiographic picture of prolonged QRS-complex duration with short PR interval was the subject of isolated reports 1,2 until Wolff, Parkinson and White 3 described the clinical syndrome of ...

TO THOSE with extensive electrocardiographic experience, especially if it includes a large proportion of young adults, the finding of the pattern of a short PR interval and a prolonged QRS complex ...

Figure 2 shows a regular rhythm at a rate of 90 beats/min. The QRS complex duration is increased (0.14 sec), and there is a morphology of a right bundle branch block with an RSR' morphology in lead V1 ...

The diagnosis is right bundle branch block, left anterior fascicular block, Mobitz type I (Wenckebach) with 2:1 and 3:2 atrioventricular conduction (Figure 2). The rhythm is regular, except for the ...

A 94-year-old female with history of hypertension, chronic kidney disease, and hyperlipidemia presents to the emergency ...

ORLANDO, Fla. — Cardiac resynchronization therapy may be detrimental in patients with right bundle branch block and a very wide QRS duration, defined as 180 ms or more, according to findings presented ...

A randomized, controlled, multi-center trial has found that cardiac resynchronization therapy produced no improvement in peak oxygen uptake during exercise testing, the trial's primary endpoint, in ...

Wide complex tachycardia is a general term that refers to conditions that cause an unusually fast heart rate and a particular pattern on an EKG. Tachycardia is when your heart beats unusually fast, ...

Men whose electrical impulses take a few milliseconds longer to travel through the lower chambers of the heart have an increased risk for sudden cardiac death (SCD), according to research reported in ...

A first-degree AV node block occurs when conduction through the AV node is slowed, thus delaying the time it takes for the action potential to travel from the SA node, through the AV node, and to the ...

A randomized, controlled, multi-center trial has found that cardiac resynchronization therapy produced no improvement in peak oxygen uptake during exercise testing, the trial's primary endpoint, in ...