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Considering that the total cardiac cycle has a duration of one second (for a base heart rate of 60 beats per minute), the probability of impact trauma within the window of vulnerability is 1–3 percent only. [1] The cellular mechanisms of commotio cordis are not fully understood. However, it is widely recognized that it may be related to the ...
The section shows: 1) the opened ventricles contracting once per heartbeat—that is, once per each cardiac cycle; 2) the (partly obscured) mitral valve of the left heart; 3) the tricuspid and pulmonary valves of the right heart—note these paired valves open and close oppositely. + (The aortic valve of the left heart is located below the ...
A typical heart rate is 75 beats per minute (bpm), which means that the cardiac cycle that produces one heartbeat, lasts for less than one second. The cycle requires 0.3 sec in ventricular systole (contraction)—pumping blood to all body systems from the two ventricles; and 0.5 sec in diastole (dilation), re-filling the four chambers of the ...
"Heartless" is a song written and recorded by the rock band Heart in 1976 for their album Magazine. Issues with the band's previous record label Mushroom caused a delay in the album's release and "Heartless" was released as a single two years later, after the re-issue of their first single "Crazy on You".
It is almost always indicative of left ventricular systolic impairment, and carries a poor prognosis. The condition is relatively rare, and patients with the greatest risk for developing pulsus alternans include those with heart failure, cardiomyopathy , coronary artery disease, or other cardiac risk factors.
"Restless Heart" is a song by US singer Peter Cetera, written by Cetera and Andy Hill and released from the album World Falling Down in 1992. "Restless Heart" was Cetera's final of five number-one hits on the US Adult Contemporary chart, spending two weeks at the top.
Denny Laine, guitarist of Wings and Moody Blues fame, covered the song on his 1977 Buddy Holly tribute album, Holly Days, produced by Paul McCartney. The Knack ( Get the Knack , 1979) The Hollies , who had named themselves after Buddy Holly, made their only attempt at having a hit remake of a Buddy Holly song with a 1980 single release of ...
"When a Heart Beats" is a song by the English singer-songwriter Nik Kershaw, released as the lead single from his third studio album, Radio Musicola (1986)—although the song does not appear on the LP version of the album, only on the cassette and CD editions. Kershaw's eighth single overall, it features the track "Wild Horses"—w