ECGs

A 14-year-old girl with known unrepaired ventricular septal defect presents with cyanosis, sudden-onset dyspnea and palpitations.

A 91-year-old woman presents to the emergency department with worsening symptoms of dyspnea, orthopnea, lightheadedness, and lower extremity edema. Her blood pressure is 100/70 mm Hg.

A 63-year-old man with diabetes, hypertension, and 6 months of intermittent exertional substernal chest pressure undergoes an exercise stress test. An ECG is obtained at peak exercise.

A patient is noted to have a regularly irregular pulse on exam. An ECG is obtained. What is the rhythm ?

A 67-year-old man presents to the emergency department with shortness of breath, palpitations, and chest discomfort. An ECG is obtained. What's your interpretation ?

A 36-year-old man presents with acute onset of palpitations. He has no known history of heart disease. What is the origin of the tachyarrhythmia?

An 88-year-old man on digoxin presents to his cardiologist for routine follow-up. He is complaining of occasional palpitations and shortness of breath, and an ECG is obtained.

A 68-year-old woman presents to the ED with fatigue, breathlessness with minimal exertion, and muscle aches. She denies angina.

A 55-year-old woman presents with palpitations and breathlessness. What's your interpretation?

A 48-year-old woman with severe asthma is admitted to the hospital with palpitations. She is initially thought to have atrial fibrillation and is treated with attempts at rate control.