What's the source of the unusual electrocardiogram (ECG) findings in a patient presenting with dizziness and limb weakness? That's the mystery posed in a recent case report. The diagnostic challenge ...

The rhythm in Figure 1 has a subtle pattern—a narrow QRS complex with alternating short and long R-R intervals, resulting in paired QRS complexes. Careful observation of V1 in Figure 2 reveals tiny ...

When your electrical system is working normally, the two upper chambers of the heart (atria) contract and pump blood into the two lower chambers (ventricles) in a well-coordinated way. This results in ...

The diagnosis is nonsustained atrial tachycardia and left ventricular hypertrophy (LVH) with associated ST-T wave changes. There is a regular narrow complex tachycardia at a rate of 240 beats/min. At ...

Please provide your email address to receive an email when new articles are posted on . Dronedarone was associated with lower incidence of permanent atrial fibrillation/atrial flutter, more return to ...