Diastole is the period of time when the heart relaxes after systole (contraction). Systole (ˈsɪstɒli rhymes with "fiscally" is the contraction of Heart chambers driving blood out of the chambers Ventricular diastole is the period during which the ventricles are relaxing, while atrial diastole is the period during which the atria are relaxing. In the Heart, a ventricle is a heart chamber which collects Blood from an atrium (another heart chamber that is smaller than a ventricle and In Anatomy, the atrium (plural atria) refers to a chamber or space You can remember which is which (diastole and systole) because the Greek word diastole meaning "dilation" shares the same prefix, "Di".
Contents |
Inside the heart
During ventricular diastole, the pressure in the (left and right) ventricles drops from the peak that it reaches in systole. When the pressure in the left ventricle drops to below the pressure in the left atrium, the mitral valve (atrioventricular bicuspid valve) opens, causing accumulated blood from the atrium to flow into the ventricle. The miter valve (also known as the bicuspid valve or left atrioventricular valve) is a dual flap (bi = 2 valve in the Heart that lies between
Inside the arteries
The adjective "diastolic" is used to refer to the relaxation of the heart between muscle contractions. The heart is a muscular organ in all Vertebrates responsible for pumping Blood through the Blood vessels by repeated rhythmic It is used to describe portions of the cardiac cycle related to contraction. Cardiac cycle is the term referring to all or any of the events related to the flow of blood that occur from the beginning of one heartbeat to the beginning of the next More typically it is used as one component of measurement of blood pressure. Blood pressure is also the title of a short story by Damon Runyan in Guys and Dolls and Other Stories "Diastolic pressure" refers to the lowest pressure within the arterial blood stream occurring during each heart beat. The other component of blood pressure is systolic pressure, which refers to the highest arterial pressure during each heart beat. Systole (ˈsɪstɒli rhymes with "fiscally" is the contraction of Heart chambers driving blood out of the chambers When stating blood pressure, systole and then diastole is mentioned; for example: 120/80.
See also
External links
- Diastole at eMedicine Dictionary
- d_15/12294136 at Dorland's Medical Dictionary
Dictionary
diastole
-noun
- (physiology) The relaxation and dilation of the heart chambers, between contractions, during which they fill with blood.
Dapyx Software network: MP3 Explorer | Ebook Manager | Zenithic