What are the three phases of ventricular filling?

What are the three phases of ventricular filling?

LV filling occurs during diastole, which has 4 phases: (1) isovolumic relaxation; (2) rapid filling phase; (3) slow filling, or diastasis; and (4) final filling during atrial systole (atrial kick.)

What is the relaxation phase of cardiac cycle called?

Systole is the contraction phase of the cardiac cycle, and diastole is the relaxation phase.

What is first rapid filling phase?

RAPID FILLING PHASE  When AV – Valves are opened, there is a sudden rush of blood from atria into ventricles.  So, this period is called the first rapid filling period.  Ventricles also relax isotonic ally about 70 % of filling takes place during this phase, which last for 0.11 sec.

What happens during the diastolic phase?

Diastole is when the heart muscle relaxes. When the heart relaxes, the chambers of the heart fill with blood, and a person’s blood pressure decreases.

What is ventricular ejection?

Left ventricular ejection fraction (LVEF) is the measurement of how much blood is being pumped out of the left ventricle of the heart (the main pumping chamber) with each contraction.

What is apicoaortic conduit surgery?

Apicoaortic Conduit (AAC), also known as Aortic Valve Bypass (AVB), is a cardiothoracic surgical procedure that alleviates symptoms caused by blood flow obstruction from the left ventricle of the heart. Left ventricular outflow tract obstruction (LVOTO) is caused by narrowing of the aortic valve ( aortic stenosis)…

What type of heart valve is used in a valved conduit?

For the valved conduit, surgeons have used the Medtronic Hancock Model 105 or 150 valved conduits which contain a complete porcine aortic valve. Other surgeons have constructed valved conduits on the back table using a variety of bioprosthetic valves such as the Medtronic Freestyle valve.

What causes a heart conduit to become obstructive?

Conduits may develop obstructions because of kinking, thrombus (blood clots), or fibrous tissue ingrowth (scarring) at either the ventricular or pulmonary insertion sites. If the conduit also contains a valve, the valve in the conduit will usually calcify over time and become less mobile and stenotic.

Why are metallic conduits no longer used in the pulmonary circulation?

Metallic conduits are no longer used in the pulmonary circulation because of the risk of thrombosis (clot formation). In some cases, conduits may be supported by internal stents.