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I may be guessing here but I am thinking with an increase in stroke volume you body is getting more volume per beat ... therefore it compensates by lowering the heart rate. if your pump is more efficient then you body doesn't need your heart to pump as often. That's the only rationale i can think would cause it!
What else can I help you with?
What happens if stroke volume increases?
If stroke volume increases, more blood is pumped out of the heart with each contraction. This results in an increase in cardiac output, which is the amount of blood pumped by the heart in one minute. An increase in stroke volume can also lead to a drop in heart rate to maintain overall cardiac output.
What is stroke volume for a normal resting heart?
It is normally around 70mL. Depending on the person's size and physical activity levels, the "normal" stroke volume varies from between 60mL to 100mL.
Does a slower heart rate increase end diastolic volume stroke volume and force a contraction?
yes
Is stroke volume inversely proportional to the after load?
Yes, stroke volume is inversely proportional to afterload. An increase in afterload, such as from increased vascular resistance, can lead to a decrease in stroke volume due to the additional pressure the heart has to work against to eject blood. Conversely, decreasing afterload can help increase stroke volume.
Which of the following would cause the greatest increase in cardiac output?
Increased heart rate and increased stroke volume
Would stroke volume increase or decrease if your unhealthy?
Stroke volume can decrease if you are unhealthy. Health conditions such as heart failure, heart disease, or dehydration can negatively affect the heart's ability to pump blood effectively, leading to a decrease in stroke volume.
What happens to the pump rate when you increase the stroke volume?
When you increase the stroke volume, the pump rate can decrease. This is known as the Frank-Starling mechanism, where the heart adjusts its rate based on the volume of blood returning to it. The increased stroke volume leads to more efficient pumping, allowing the heart to beat at a slightly slower rate to maintain cardiac output.
What decreases stroke volume?
Factors that decrease stroke volume include dehydration, blood loss, heart failure, and certain medications that negatively affect the heart's ability to contract effectively. Additionally, an increase in heart rate can also lead to a decrease in stroke volume as the heart does not have enough time to fill properly between beats.
How can one increase stroke volume in the heart?
Increasing stroke volume in the heart can be achieved through regular exercise, maintaining a healthy diet, managing stress levels, and avoiding smoking. These lifestyle changes can help improve heart function and increase the amount of blood pumped with each heartbeat.
Why do you have a increased stroke volume?
An increase in stroke volume can be due to factors such as increased cardiac contractility (force of heart contractions), decreased afterload (pressure the heart must overcome to eject blood), or increased preload (volume of blood returned to the heart). These factors can result in more blood being pumped out by the heart with each contraction, leading to an increased stroke volume.
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.
How can stroke volume can be altered?
Stroke volume is determined by three factors, altering any of them can change the stroke volume. These factors are preload, afterload, and contractility. The relationship is: SV = P*C/A What this means is that preload and contractility are directly proportional to the stroke volume and afterload is inversely proportional to stroke volume. If you increase preload (within certain limits), stroke volume will increase according to the Starling curve. Increasing contractility (many things can increase this), makes the heart pump harder and increases stroke volume. Increasing afterload decreases stroke volume. All of these can be reversed (decreasing preload and contractility = decreased stroke volume, etc). Get a good physiology book and it will explain all of this very well.
