ECGs

A 64-year-old woman presents to her internist because of diffuse bone pain, fatigue, and a 20-pound weight loss. Routine blood tests showed a hematocrit of 25, a serum creatinine of 2 mg/dL.

A 74-year-old man on digoxin for rate control of paroxysmal atrial fibrillation is admitted with pre-syncope.

A 64-year-old woman with longstanding diabetes is evaluated for complaints of atypical chest discomfort (left-sided ache). She has been taking a β-blocker for hypertension. She undergoes an exercise stress test, which provokes her symptoms.

A 56-year-old diabetic man with no known heart disease presents with near-syncope. His blood pressure is 100/60 mm Hg, and he is diaphoretic.

A 57-year-old woman presents to the emergency department with symptoms of chest pressure at rest, lasting for about 1 hour. She has a history of left main coronary artery stenosis as well as three-vessel disease for which she underwent bypass surgery 4 years ago.

A 41-year-old woman with advanced familial hypertrophic cardiomyopathy is admitted to the hospital with syncope. The woman is hemodynamically stable but has a heart rate of 40 bpm.

A 72-year-old man with past myocardial infarction, a left ventricular ejection fraction of 30%, and prior episodes of heart failure presents with intermittent palpitations. The following ECG is obtained while the patient is having symptoms.

A 36-year-old woman with primary pulmonary hypertension is seen in her physician’s office after initiation of pulmonary vasodilator therapy. She is found to be tachycardic with an irregularly irregular heart rate.

A 14-year-old boy is brought to his pediatrician’s office after he complains of palpitations. What is the rhythm ?

A 75-year-old woman presents to the emergency department following 2 hours of chest discomfort. She states that the central chest pressure began suddenly while she was watching TV after dinner.