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What else can I help you with?
When does Isovolumetric relaxation and ventricular filling take place?
Ventricular Diastole
During atrial systole 70 percent of ventricular filling occurs?
No. Most (~70%) of ventricular filling occurs passively, without atrial contraction.
What is a possible reason for lower maximal heart rates observed in endurance-trained athletes?
Slower heart rates increase ventricular filling time
Decreased cardiac output elevated left ventricular filling pressure peripheral vasoconstriction and arterial hypotension are all hallmark signs of what?
heart failure...
When heart rate is increased the time of ventricular filling is?
. . . decreased.
What occurs during the time between the first heart sound and the second sound a. systole d. a heart mur mur b. diastole e. the p wave of the ecg c. ventricular filling?
I have no idea:P
During which phase of the cardiac cycle do the ventricles of the heart contract?
There are many phases of the cardiac cycle- in total five stages occur. phase 1) - Isovolumetric ventricular contraction In response to ventricular depolarization, tension in the ventricles increases. The rise in pressure within the ventricles leads closure of the mitral and tricuspid valves. The pulmonic and aortic valves stay closes during the entire phase. 2) ventricular ejection: When ventricular pressure exceeds aortic and pulmonary arterial pressure 80MMHG- the aortic and pulmonic valves open and the ventricles eject 70% of the blood. 3) Isovolumetric relaxation: when ventricular pressure falls below pressure in the aorta and pulmonary artery, the aortic and pulmonic valves close. All valves are closed during this phase. Atrial diastole occurs as blood fills the atria.4) ventricular filling: atrial pressure exceeds ventricular pressure which causes the mitral and tricuspid valves to open. Blood then flows passively into the ventricles. About 70% of ventricular filling takes place during this phase. 5) atrial systole: known as the atrial kick, atrial systole coinciding with late ventricular diastole supplies the ventricles with the remaining blood for each heart beat. Diastole: This occurs in-between heartbeats to allow blood to refill the heartSystole: when the atria and ventricles contact For more information e-mail me: Elliottcollins@hotmail.co.uk I also have a VERY helpfull link belowHow_heart_works
What happens if the AV node is damaged or non functional?
There is no coordination between the atria and the ventricles, and ventricular filling can become compromised.
What is filling pressure in lpg cylinder?
The filling pressure in an LPG cylinder refers to the amount of pressure at which the cylinder is filled with liquefied petroleum gas. This pressure can vary depending on factors such as the type of gas being used and the ambient temperature. Typically, the filling pressure for LPG cylinders ranges from 2 to 10 bar.
What type of pressure is involved in the filling of a liquid in syringe?
Atmospheric pressure.
Why does increasing heart rate increase stroke volume?
Increasing heart rate does not increase stroke volume. At first, increasing exertion increases both heart rate and stroke volume. As the heart rate increases, the time spent in diastole decreases, so there is less time for the ventricles to fill with blood. The stroke volume therefore stops increasing, and as the heart rate approaches the maximum heart rate the stroke volume may begin to decrease.
What is isovolumetric ventricular relaxation?
As the ventricle begins to relax, the pressure in the ventricle begins to decline. The pressure in the artery (which now has all the ejected blood) is now greater than that in the ventricle. The blood now closes the semi-lunar valve as it tries to go from the artery into the ventricle preventing any back-flow. Although the pressure in the ventricle is declining, it is still greater than that in the atria so the AV valves are still closed. Thus as the ventricle is relaxing, the volume of blood in the ventricle is not changing. This stage will continue until the ventricular pressure becomes lower than the atrial pressure and the filling stage starts again. http://academic.kellogg.edu/herbrandsonc/bio201_mckinley/f22-11_cardiac_cycle_c.jpg
