Cardiovascular

Overview An electrocardiogram (ECG) is a medical test that records the electrical activity of

Snapshot A 10-year-old boy presents to the pediatrician’s office for an electrocardiogram. His family

Overview Transposition of Great Vessels is a congenital heart condition where the main blood

Snapshot A 15-year-old girl presents with palpitations and dizziness. She has had similar episodes

Snapshot A 34-year-old man presents to his doctor’s office for a rash of several

Snapshot A 61-year-old man presents to the emergency department for vague abdominal and back pain.

Snapshot A 30-year-old man presents with increased frequency in urination and persistent thirst despite

Overview Normal intracardiac pressures (see chart above)  Pulmonary wedge pressure (PWP) an approximation of left

Overview SA Node Action Potential; also AV Node  Phase 0, upstroke   action potential opens L-type voltage-gated Ca2+ channels

Introduction Microcirculation capillaries, the smallest blood vessels, are the site of exchange of nutrients, waste products,

Snapshot A 64-year-old man with chronic obstructive pulmonary disease presents with palpitations and lightheadedness.

Overview Snapshot A 46-year-old woman presents for the evaluation of “visible” veins in both