Background: A 42-year-old woman with limited cutaneous systemic sclerosis presented with rapid-onset dyspnea on exertion, which had developed over the previous 8 weeks. She had not experienced any ...

A high index of suspicion combined with a meticulous history and physical examination is paramount in the evaluation of patients with pulmonary hypertension. Careful attention should be given to prior ...

A heart perfusion imaging scan, or myocardial perfusion scan, is a test that tells doctors how well a person’s heart pumps blood. Doctors may use this test when diagnosing the cause of chest pain or ...

When you breathe, a certain fraction of your air enters the lungs and blood flows through the capillaries. When this ratio is above or below 0.8, you may have ventilation/perfusion (V/Q) mismatch. A V ...

THE present study was undertaken to determine if the pattern of ventilation, by itself, may influence oxygenation during anesthesia and surgery. The hypothesis was examined that progressive pulmonary ...

Backround A 40-year-old woman presented with dyspnea in the fifth month of pregnancy followed by a sudden onset of pleuritic chest pain 2 weeks postpartum. She was diagnosed as having pulmonary ...

Chronic thromboembolic pulmonary hypertension (CTEPH) is the end result of persistent obstruction of the pulmonary arteries by acute or recurrent pulmonary emboli. In the era of successful surgical ...

MDCT pulmonary angiography is replacing the ventilation-perfusion lung scan to diagnose suspected pulmonary embolism in hospitalized patients, say researchers from Rhode Island Hospital in Providence.

A 62-year-old man was resuscitated from a ventricular fibrillation cardiac arrest. His coronary angiogram was normal, and a gated blood pool scan demonstrated normal left ventricular function. An ...

The influence of gravity on the distributions of ventilation and blood flow, as demonstrated by the effects of posture, is discussed and explained on the theoretical basis of gravitational gradients ...

Background A 42-year-old woman with limited cutaneous systemic sclerosis presented with rapid-onset dyspnea on exertion, which had developed over the previous 8 weeks. She had not experienced any ...