This is a narrow complex tachycardia with a rate of 124 beats/min. The QRS morphology and axis are normal. The QTc is prolonged, at 529 ms (normal, 390-450 ms for men). The underlying P waves appear ...

2:1 atrioventricular block is a form of second-degree AV nodal block and occurs when every other P wave is not conducted through the AV node to get to the ventricles, and thus every other P wave is ...

We reviewed randomized controlled trials, review articles and clinical practice guidelines to present a practical approach to the diagnosis and management of SVTs (Box 1). We focus on the most common ...

The correct diagnosis is atrial tachycardia with variable block (Figure 2). Figure 2. Courtesy of Dr Podrid. The rhythm is basically regular at a rate of 50 beats/min, although the first and second ...

Abnormal heart rhythms (dysrhythmias) are caused by disturbances in electrical impulse generation or by abnormal conduction between chambers of the heart – principally within the sinus node, ...

What Is the Heart Conduction System? The heart conduction system is made up of cells, nodes, and signals that help your heart to beat. In fact, the cardiac conduction system is responsible for our ...