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glossary:diastolic_pressure

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glossary:diastolic_pressure [2008/04/18 06:47]
Pat O'Connor
glossary:diastolic_pressure [2012/10/16 14:40] (current)
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 +Referring to the time when the [[heart]] is in a period of relaxation and dilatation (expansion). ​
 +
 +The noun for diastolic is diastole. (The final letter in "​diastole"​ is pronounced as a long "​e"​ as in "​lee."​) ​
 +
 +The diastolic pressure is specifically the minimum arterial pressure during relaxation and dilatation of the [[ventricle]]s of the heart when the ventricles fill with [[blood]]. ​
 +
 +In a [[blood_pressure]] reading, the diastolic pressure is typically the second number recorded. For example, with a blood pressure of 120/80 ("120 over 80"), the diastolic pressure is 80. By "​80"​ is meant 80 mm Hg (millimeters of mercury). ​
 +
 +A diastolic murmur is a heart murmur heard during diastole, the time the heart relaxes. ​
 +
 +"​Diastolic"​ came from the Greek diastole meaning "a drawing apart."​ The term has been in use since the 16th century to denote the period of relaxation of the heart muscle.
  
glossary/diastolic_pressure.txt ยท Last modified: 2012/10/16 14:40 (external edit)