ECGs

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.

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 ?