The correct diagnosis is sinus tachycardia, left atrial abnormality, and QRS (electrical) alternans, right axis caused by left posterior fascicular block (Figure 2). The rhythm is regular at a rate of ...

There is a regular rhythm, although the fourth and ninth QRS complexes (*) are slightly early — ie, a shorter RR interval. The QRS complexes are narrow and have a normal morphology and axis. The rate ...

Left ventricular hypertrophy (LVH) is an abnormal thickening of the left ventricular myocardium that occurs as an adaptive mechanism to increased afterload. The left ventricular myocytes hypertrophy ...

Cardiac-resynchronization therapy (CRT) reduces morbidity and mortality in chronic systolic heart failure with a wide QRS complex. Mechanical dyssynchrony also occurs in patients with a narrow QRS ...

A 62 year old male with a history of hypertension presents to his primary care physician for a routine check-up. His blood pressure is 220/110. He admits to not taking his blood pressure medications ...