Background A routine sports evaluation identified constant alternation between a junctional and idioventricular rhythm in a 9-year-old child. During exercise testing, electrography demonstrated that ...

A 90 year old male with no past medical history to clinic with a complaint of generalized weakness, dizziness, and dyspnea on exertion. Mild lower extremity edema, paroxysmal nocturnal dyspnea, and ...

In Atrial Arrhythmias the cause of the arrhythmia is in the upper chambers of the two atria. Supraventricular Tachycardia (SVT) is rapid heartbeats originating anywhere above the ventricles. It ...

Nodal rhythm - When there is a block in conduction of impulses AV node takes over as the pacemaker. This abnormal heart rhythm is called junctional rhythm or nodal rhythm. The heart rate in such cases ...

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 ...

This 81 year old woman presents to her GP with blackouts lasting a few seconds. What does her ECG show? A Sinus rhythm with Mobitz I second degree (Wenckebach) AV block The ECG shows consistent p ...