Regarding the cardiac cycle at resting HR, when in the cycle does ventricular filling occur? How important is atrial contraction to the EDV? Why is the first part of ventricular contraction isovolumetric? When and why does rapid ejection of blood from the ventricle occur?

Q: What effect would have cardiac arrhythmias, such as acute atrial fibrillation on cardiac output and…

A: The complications of heart arrhythmias might incorporate stroke, unexpected death, and…

Q: The cardiac output of 70-year-old man at rest is 5.5L / min; mean HR is 85 bpm. Left ventricular…

A: Heart is a pumping structure and is an important organ of circulatory system which helps in sending…

Q: Illustrate and describe the changes in pressure (aortic and lel ventricular) and volume…

A: A normal heart rate is around 72 beats per minute with each cardiac cycle around 0.8 seconds. Under…

Q: during a procedure, a patient's end diastolic volume was found to be 127mL. The end systolic volume…

A: In the human circulatory system, the heart is considered the central organ that plays a significant…

Q: Describe the effects of sympathetic neuron stimulation on cardiacmuscle during contraction and…

A: Contraction in cardiac muscle occurs with the help of the sliding filament model of contraction.…

Q: Given the following cardiac performance data, Cardiac output (CO) 5 5400 mL/min Heart rate (HR) 5 75…

A: Introduction: Ejection fraction is a method for quantifying cardiac contractility. It has a value…

Q: Compare action potential of pacemaker and non-pacemaker (working) myocardial cells?

A: Cell can be defined as the basic membrane-bound unit which contains the fundamental molecules of…

Q: Explain isovolumetric ventricular relaxation?

A: The time between the atrial contraction and ventricular relaxation or between one heartbeat's end to…

Q: Draw the pressure changes along the systemic and pulmonaryvascular systems during the cardiac cycle?

A: Along the systemic and pulmonary vascular systems during the cardiac cycle  the pressure which…

Q: ich of the following is an accurate descriptione d the subsequent (second) P wave (second cardi

A: Measuring rate and regularity of heartbeat, size, and shape by electrocardiograph, detect tiny…

Q: What is the pacemaker potential due to, and what is its inherent rate?

A: The rhythm of the heart is normally determined by a pacemaker site called the sinoatrial (SA) node…

Q: Describe the pacemaker potential and the myocardial action potential, and explain how the latter…

A: Heart is the major pumping organ in our circulatory system. It has two types of cells namely;…

Q: Discuss Mechanical Events of the Cardiac Cycle?

A: The human heart contracts 72 times per minute at rest. During each heart beat, the heart chambers…

Q: Plot the tension in the left ventricle, assuming that only the diameter changes during the cardiac…

A: The blood flows through the systemic and pulmonary circulation following a specific pathway known as…

Q: Explain the term isovolumetric ventricular contraction?

A: The cardiac cycle in animals is the result of the atrial and ventricular contraction and relaxation…

Q: What major movements of ions account for each phase of the action potential of a typical myocardial…

A: Action potential  The rapid rise in the voltage of the membrane potential across the cellular…

Q: Discuss the relationship between Ventricular end-diastolic Volume and Stroke Volume?

A: Cardiac output (CO) is the volume of blood pumped by the heart through the systemic circulation. It…

Q: 29. 30. State the significance of the longer action potential in a cardiac CONTRACTILE cell. State…

A: The myocardial contractile cells comprise the mass amount of the cells in the atria and ventricles.…

Q: The onset of ventricular systole is characterized by the closing of AV valves and ?

A: The cardiovascular system is a vital division of the body's circulatory system comprised of the…

Q: What is the ejection fraction of the heart, and which amount of ejection friction is considered…

A: Heart is vital circulatory organ found in vertebrates and some of invertebrates. This essential…

Q: What is venous return? Explain how it affects preload.How does preload affect cardiac output? State…

A: An electrocardiogram (ECG or EKG) records the electrical signal from your heart to check for…

Q: Elma, an athlete, has a low resting heart rate of 60 heartbeats per minute. Her resting cardiac…

A: Heart is the principal organ of the cardiovascular system. In addition to the heart it includes the…

Q: Why is the cardiac action potential propagated more slowly in an AV node cell then in an atrial or…

A: Cardiac action potential  It refers to the short alteration in the voltage i.e. membrane potential…

Q: prthostatic hypotension ha

A: Orthostatic hypotension is a reduction in the blood pressure that is more than 20 mmHg in the…

Q: The cardiac cycle includes all the events associated with the flow of blood through the heart during…

A: An electrocardiogram (ECG) is a recording of the electrical changes that occur in myocardium during…

Q: Why is a high resting BP considered a risk for exercise testing? Based on your knowledge of BP…

A: The force of the blood rushing against the walls of the arteries is known as blood pressure. When…

Q: Parasympathetic stimulation also increases the delay between atrial and ventricular contractions.…

A: In physiology, the parasympathetic nervous system is responsible for the stimulation of…

Q: What is the concept of Cardiac Output Max, Cardiac Output Rest, and Cardiac Output Reserve?

A: The heart, which pumps blood, is a crucial organ. All parts of the body receive oxygen and nutrients…