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 ...

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 ...

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 ...

Among patients hospitalized with heart failure, having a longer than normal QRS duration (a measurement of the electrical conducting time of the heart on an electrocardiogram (ECG)] appears to predict ...

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, ...

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 ...

If a premature atrial contraction occurs when the AV node has not yet recovered from the refractory period, the PAC will fail to conduct to the ventricles and there will not be a QRS complex ...

QRS interval widening appears to be highly specific for the diagnosis of hyperkalemia in patients with end-stage kidney disease. ECG changes, in general, have poor sensitivities for hyperkalemia in ...

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 ...