In contrast to the paroxysmal variety ... Figure 4 illustrates an example of nonparoxysmal junctional tachycardia. Note the gradual onset of the junctional mechanism as the sinus cycle length ...

are designated as paroxysmal supraventricular tachycardia, and are most frequently due to atrioventricular re-entry tachycardia (AVRT) or atrioventricular nodal re-entry tachycardia (AVNRT).

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Figure 3. Twelve-lead ECG tracing during stress test shows the typical aspect of bidirectional ventricular tachycardia characterized by 180° alternating QRS axis on a beat-to-beat basis, with a right ...

The term dilated cardiomyopathy (DCM) refers to a spectrum of heterogeneous myocardial disorders that are characterized by ventricular dilation and depressed myocardial performance in the absence of ...

1 Frequent ventricular ectopic (VE) beats (or premature ventricular contractions (PVC)), non-sustained ventricular tachycardia (NSVT), and atrial fibrillation (AF) are the most common arrhythmias seen ...

Researchers are still determining the cause of these extended symptoms, but some people with “long-haul” COVID-19 may be dealing with a known condition called postural orthostatic tachycardia syndrome ...