The Life and Death of An American Statesman.

John Hay was born in a small mid-western town and sent by his physician father to Brown University for his education. He returned to Springfield IL where he was hired by Abraham Lincoln as a personal secretary and stayed with Lincoln through the assassination. He then returned to private life, married into a wealthy family and developed a successful literary and investment career.

Atypical Cardiac Tamponade Manifesting as Left Ventricular Diastolic Collapse: A Case Report.

Cardiac tamponade is a medical emergency, the diagnosis of which is predominantly clinical with supportive echocardiographic findings. Echocardiographic findings highly suggestive of cardiac tamponade include chamber collapse, inferior vena cava (IVC) plethora, and respiratory volume/flow variations. The right-sided cardiac chambers are a low-pressure system and are the first to show signs of collapse with high specificity for tamponade.

The Birth of Angiotensin: An International Compromise.

Irvine Page in the United States and Eduardo Braun-Menéndez in Argentina led teams of investigators that studied the role of the kidney in blood pressure regulation. Contemporaneously in 1939, each team using different methods discovered and described a new substance now known as angiotensin. At the time of discovery, Page called it "angiotonin" and Braun-Menéndez called it "hipertensina," anglicized to "hypertensin.

The Computerized ECG: Friend and Foe.

Computerized interpretation of the electrocardiogram (ECG) began in the 1950s when conversion of its analog signal to digital form became available. Since then, automatic computer interpretations of the ECG have become routine, even at the point of care, by the addition of interpretive algorithms to portable ECG carts. Now, more than 100 million computerized ECG interpretations are recorded yearly in the United States.