Even in the earliest writings on the subject, the idea was expressed that vibrations due to the opening of the semilunar valves took part in the formation of the first sound (Cruveilhier ...

Diastolic heart failure is defined clinically when signs and symptoms of heart failure are present in the presence of preserved left ventricular systolic function (ejection fraction >45%). The ...

Half-Life 2 players are first greeted not with a tutorial nor text, but with a command and a piercing gaze. As far as overtures go, the opening minute of Valve’s legendary game more closely evokes the ...