Please describe the pressure changes in the right ventricle during diastole, and illustrate this with a diagram.

Welcome back Akm — been a while! Let's pick up where you left off. Here are the descriptions for the requested diagrams: A. Pressure changes in the RIGHT ventricle during diastole. A diagram illustrating the pressure changes in the right ventricle during diastole would typically show pressure on the y-axis and time on the x-axis. Phase 1: Isovolumetric Relaxation Starts after the pulmonary valve closes. Right ventricular pressure drops sharply as the ventricle relaxes, but its volume remains constant because both the tricuspid and pulmonary valves are closed. Phase 2: Rapid Filling Occurs when the right ventricular pressure falls below the right atrial pressure, causing the tricuspid valve to open. Blood flows rapidly from the right atrium into the right ventricle, leading to a rapid increase in right ventricular volume and a slight initial rise then fall in pressure. Phase 3: Diastasis (Reduced Filling) The rate of filling slows down as the pressure gradient between the atrium and ventricle decreases. Right ventricular pressure remains relatively low and stable. Phase 4: Atrial Systole (Atrial Kick) The right atrium contracts, pushing the final amount of blood into the right ventricle. This causes a small, final increase in right ventricular pressure and volume just before the tricuspid valve closes and systole begins. The graph would show a sharp decline in pressure during isovolumetric relaxation, followed by a relatively flat or slightly undulating curve during rapid filling and diastasis, and a small upward spike during atrial systole. B. Effect of increasing central venous pressure (CVP) on end diastolic volume (EDV). A clearly labeled graph illustrating the effect of increasing central venous pressure (CVP) on end diastolic volume (EDV) would have: X-axis: Central Venous Pressure (CVP) (e.g., in mmHg) Y-axis: End Diastolic Volume (EDV) (e.g., in mL) The graph would show a positive relationship, demonstrating the Frank-Starling mechanism: As CVP increases, the venous return to the right atrium and subsequently to the right ventricle also increases. This increased filling pressure (CVP) leads to a greater stretch of the right ventricular muscle fibers at the end of diastole. Consequently, the End Diastolic Volume (EDV) increases. The curve would typically show an initial steep rise, indicating that EDV increases significantly with initial increases in CVP. As CVP continues to rise, the curve would gradually flatten, suggesting that the ventricle reaches a point where further increases in CVP lead to smaller increments in EDV, as the ventricle approaches its maximum stretch capacity. The overall shape of the curve would be an upward-sloping line that eventually plateaus. Send me the next one 📸