systole
Sign in to savethumb|upright=1.5|The cardiac cycle at the point of beginning a ventricular systole, or contraction: 1) newly oxygenated blood (red arrow) in the left ventricle begins pulsing through the aortic valve to supply all body systems; 2) oxygen-depleted blood (blue arrow) in the right ventricle begins pulsing through the pulmonic (pulmonary) valve en route to the lungs for reoxygenation. Systole ( ) is the part of the cardiac cycle during which some chambers of the heart contract after refilling with blood. Its contrasting phase is diastole, the relaxed phase of the cardiac cycle when the chambers o
Article
16 sectionsContents
- Etymology
- Terminology, general explanation
- Types of systole
- Atrial systole
- Right and left atrial systoles
- Atrial fibrillation
- Ventricular systole and Wiggers diagram
- Right and left ventricular systoles
- Electrical systole
- Mechanical systole
- Physiological mechanism
- Clinical notation
- Pathology
- See also
- References
- External links
thumb|upright=1.5|The cardiac cycle at the point of beginning a ventricular systole, or contraction: 1) newly oxygenated blood (red arrow) in the left ventricle begins pulsing through the aortic valve to supply all body systems; 2) oxygen-depleted blood (blue arrow) in the right ventricle begins pulsing through the pulmonic (pulmonary) valve en route to the lungs for reoxygenation. Systole ( ) is the part of the cardiac cycle during which some chambers of the heart contract after refilling with blood. Its contrasting phase is diastole, the relaxed phase of the cardiac cycle when the chambers of the heart are refilling with blood.
==Etymology== The term originates, via Neo-Latin, from Ancient Greek (sustolē), from (sustéllein 'to contract'; from sun 'together' + stéllein 'to send'), and is similar to the use of the English term to squeeze.