Definition of diastole
What does diastole mean?
Definition of diastole
: a rhythmically recurrent expansion especially : the relaxation and dilation of the chambers of the heart and especially the ventricles during which they fill with blood — compare systole. Other Words from diastole Example Sentences Learn More About diastole.
What is diastole and systole?
Summary. Diastole and systole are two phases of the cardiac cycle. They occur as the heart beats, pumping blood through a system of blood vessels that carry blood to every part of the body. Systole occurs when the heart contracts to pump blood out, and diastole occurs when the heart relaxes after contraction.
What is heart diastole?
Diastole is the period of the cardiac cycle that encompasses ventricular relaxation, passive and active filling of blood into the heart, and the period just prior to ejection. At the cellular level, the interplay of calcium within the cardiac myocytes is crucial to ventricular relaxation.
What is diastole physiology?
Diastole begins with the closing of the aortic valve (or pulmonic) and ends with the closing of the mitral valve (or tricuspid). This period encompasses the ventricular relaxation and filling. Diastole represents when the blood vessels return blood to the heart in preparation for the next ventricular contraction.
What systole means?
systole, period of contraction of the ventricles of the heart that occurs between the first and second heart sounds of the cardiac cycle (the sequence of events in a single heart beat). Systole causes the ejection of blood into the aorta and pulmonary trunk.
What is diastole in blood pressure?
The diastolic reading, or the bottom number, is the pressure in the arteries when the heart rests between beats. This is the time when the heart fills with blood and gets oxygen. This is what your diastolic blood pressure number means: Normal: Lower than 80.
What is more important systolic or diastolic?
Over the years, research has found that both numbers are equally important in monitoring heart health. However, most studies show a greater risk of stroke and heart disease related to higher systolic pressures compared with elevated diastolic pressures.
How do you remember systole vs diastole?
Your systolic blood pressure is the first number on your reading, and your diastolic blood pressure is the second.
Is diastole relaxation or contraction?
The cardiac cycle is essentially split into two phases, systole (the contraction phase) and diastole (the relaxation phase).
What does 120/80 blood pressure mean?
The new guidelines categorise blood pressure as normal (<120/80 mm Hg), pre-hypertension (120/80 to 139/89), stage 1 hypertension (140/90 to 159/99), and stage 2 hypertension (≥160/100 or higher).
Which blood pressure number is most important?
For years, systolic blood pressure has been seen as the one that really matters. That’s based on studies — including the famous Framingham Heart Study — showing that high systolic blood pressure is a stronger predictor of heart disease and stroke.
What factors affect diastolic blood pressure?
The factors discussed are heart rate, arterial pressure, coronary perfusion pressure, the pericardium, and the mechanical interplay between ventricles. The influence of heart rate, arterial pressure, and coronary perfusion pressure can be considered as minor provided they remain within their normal physiological range.
Why is diastolic pressure important?
It reflects the amount of pressure inside the arteries as the heart contracts. The bottom (second) number, diastolic pressure, is always lower since it reflects the pressure inside the arteries during the resting phase between heartbeats. As it turns out, both systolic and diastolic blood pressure are important.
What is the average blood pressure for a 70 year old?
The ideal blood pressure for seniors is now considered 120/80 (systolic/diastolic), which is the same for younger adults. The high blood pressure range for seniors starts at hypertension stage 1, spanning between 130-139/80-89.
What is stroke level blood pressure?
Call 911 or emergency medical services if your blood pressure is 180/120 mm Hg or greater and you have chest pain, shortness of breath, or symptoms of stroke. Stroke symptoms include numbness or tingling, trouble speaking, or changes in vision.