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  2. Heart valve - Wikipedia

    en.wikipedia.org/wiki/Heart_valve

    Tricuspid atresia is the complete absence of the tricuspid valve which can lead to an underdeveloped or absent right ventricle. Pulmonary atresia is the complete closure of the pulmonary valve. Ebstein's anomaly is the displacement of the septal leaflet of the tricuspid valve causing a larger atrium and a smaller ventricle than normal.

  3. Heart sounds - Wikipedia

    en.wikipedia.org/wiki/Heart_sounds

    The first heart sound, or S 1, forms the "lub" of "lub-dub" and is composed of components M 1 (mitral valve closure) and T 1 (tricuspid valve closure). Normally M 1 precedes T 1 slightly. It is caused by the closure of the atrioventricular valves , i.e. tricuspid and mitral (bicuspid), at the beginning of ventricular contraction, or systole .

  4. Björk–Shiley valve - Wikipedia

    en.wikipedia.org/wiki/Björk–Shiley_valve

    The Björk–Shiley valve consists of a single carbon-coated disc in a metal housing. The disc is held in place by two metal struts, an inflow and an outflow strut. The housing is made from the alloy Haynes 25, [1] which is composed of 51% cobalt, 20% chromium, 15% tungsten, and 10% nickel. [2]

  5. Cardiac physiology - Wikipedia

    en.wikipedia.org/wiki/Cardiac_physiology

    Normal range for SV would be 55–100 mL. An average resting HR would be approximately 75 bpm but could range from 60 to 100 in some individuals. [ 1 ] Using these numbers, (which refer to each ventricle, not both) the mean CO is 5.25 L/min, with a range of 4.0–8.0 L/min. [ 1 ]

  6. Artificial heart valve - Wikipedia

    en.wikipedia.org/wiki/Artificial_heart_valve

    An artificial heart valve is a one-way valve implanted into a person's heart to replace a heart valve that is not functioning properly (valvular heart disease).Artificial heart valves can be separated into three broad classes: mechanical heart valves, bioprosthetic tissue valves and engineered tissue valves.

  7. Cardiac cycle - Wikipedia

    en.wikipedia.org/wiki/Cardiac_cycle

    The cardiac cycle is the performance of the human heart from the beginning of one heartbeat to the beginning of the next. [1] It consists of two periods: one during which the heart muscle relaxes and refills with blood, called diastole, following a period of robust contraction and pumping of blood, called systole. [1]

  8. File:Diagram of the human heart (cropped).svg - Wikipedia

    en.wikipedia.org/wiki/File:Diagram_of_the_human...

    Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.

  9. Cardiac output - Wikipedia

    en.wikipedia.org/wiki/Cardiac_output

    Major factors influencing cardiac output – heart rate and stroke volume, both of which are variable. [1]In cardiac physiology, cardiac output (CO), also known as heart output and often denoted by the symbols , ˙, or ˙, [2] is the volumetric flow rate of the heart's pumping output: that is, the volume of blood being pumped by a single ventricle of the heart, per unit time (usually measured ...