# Heart stroke volume

## stroke

You can't measure stroke volume with the heart rate. Stroke volume is the amount of blood that your left ventricle pumps out with each heart beat. If you multiply the stroke volume by the heart rate you get your cardiac output.
I'm just telling you what a Cardiologist told me. If you are very nervous/extreme anxiety, your breathing for example when extremely nervous can influence the result of your echo. I had to have several tests done after I had an EKG which showed a previous heart attack which I never had tests later proved that. One of the tests was an echocardiogram. I had high anxiety during the test wondering how much my heart was damaged from this "previous heart attack".
i had a echocardiogam which shows that my stroke volume is 47 ml is it a normal value or it is a sign of heart failure.all other things are normal in my echo. my ejection fraction is 61.4%.
The formula for stroke volume is cardiac output (in cc's/min) / heart rate (per min). The normal range for stroke volume is 50-70 cc's and doesn't vary much with age. Stroke volume refers to the amount of blood ejected from the heart with each heartbeat. The only way to directly measure stroke volume is through a cardiac catheterization where the cardiac output can be directly measured with a catheter in the heart.
This happens by a system of vasodilation and vasoconstriction coupled with the pumping rate and stroke volume of the heart. Rather than make frequent changes in volume, the body changes the configuration of the total container (all the vessels) and increases the speed at which the resource is renewed.
Over many, many years, with high blood pressure and being very overweight, the inside of your ventrical gets thicker, and the volume inside therefore decreases, decreasing stroke volume and causing your heart rate to become higher and your heart then has to work harder to pump the same amount of blood, which over many years causes the ventricular walls to stiffen. I hope that clarifies some of it.
high MPV of even 11 or 12 is a cause for concern for stroke/MI. with 18 as my MPV, I should have been dead. How to decrease MPV? I also have GERD. Hence it may be difficult for me to use ASPRIN. HS C-reactive protein: 4 (safe values are less than 1). This number is again sky high. I have angina problems from last 18-15 yrs. Now I know it is because of high CRP. My total choles: 175, LDL-120,HDL-40, Trigly-85. BP 115/70.
The EF represents a mechanism that helps maintain a balance between the left and right side of the heart. If the left side is out of balance, the left ventricle will dilate to increase stroke volume and stronger contractility to compensate. Not unlike a compensatory increase of the heart rate. A problem develops when there is sustained overcompensation.
low cardiac output (CO is heartrate for one minute times stroke volume)....low CO causes low blood pressure. Hope this provides a perspective, and you may want to consult your doctor for an evaluation. Thsnjks for the question and if you have any further questions or comments you are welcome to respond.
I am a healthy, fit, and very active 47 year old woman--healthy lifestyle and diet, runner, and I ride my bike for transportation. Resting HR of 52. PACs started a few weeks ago, so got a Holtor which reported over 4000 PACs/24 hours (that was half of what they had been previously), sleeping HR went as low as 41. Had an echocardiogram the other day, and everything was normal, except: "severely increased left atrial volume." Mysteriously, left atrial *size* (i.e., diameter) was normal.
682 Normal(-) Stroke Volume 1.338 - 1.672 1.435 Normal(-) Left Ventricular Ejection Impedance 0.669 - 1.544 1.095 Normal(-) Left Ventricular Effective Pump Power 1.554 - 1.988 1.693 Normal(-) Coronary Artery Elasticity 1.553 - 2.187 1.938 Normal(-) Coronary Perfusion Pressure 11.719 - 18.418 20.076 Moderately Abnormal(++) Cerebral Blood Vessel Elasticity 0.708 - 1.942 0.999 Normal(-) Brain Tissue Blood Supply Status 6.138 - 21.396 9.
Cardiac hypertrophy is an increase in weight and volume of the cardiac muscle often due to disease. The heart can become dilated from overwork. Being overweight as well as other reasons can/will cause the heart to work harder and the left ventricle compensates to increase capacitiy. But if and when the LV over stretches at that creates weaker contractions and can/will cause heart failure.
This is why athletes hearts can pump blood so much more efficiently around the body. The heart muscle increases and the internal volume increases, allowing more blood to be pushed out with each stroke.
Stroke volume is a calculation to determine ejection fraction (EF)...the amount of blood pumped into circulation with each heartbeat. The calulation for EF is volume of blood in the left ventricle at systole (pumping) phase. Subtract the volume left in the ventricle after diastolic (filling) phase. Then divide the volume of blood during systole for a fraction...that would be EF. Your EF idicates you have a normal pumping heart. Normal is 50 to 70%.
Lower cardiac output (stroke times heart rate) can/will constrict blood vessels and blood pressure with rise, and that will cause an increase in heart rate rate, etc. and blood volume. Mitral valve prolapse can be a cause for low blood pressure if it reduces the amount of blood pumped with each heartbeat (lowers cardiac output) volume can contribute to the blood pressure drop and common with MVP individuals.
When you increase your muscle action, your heart beats faster and harder to send oxygen to your cells, ejecting a greater volume of blood with each stroke. High environmental temperatures during exercise can increases your heart rate above normal levels because your heart has to send blood to your skin to cool you down while continuing to supply blood to your working muscles. These two demands force your heart to beat faster.
The injury is typically due to acute myocardial infarction, but may be from a number of causes that result in increased pressure or volume overload (forms of strain) on the heart as associated with high blood pressure. Controlling bp and volume overload can reverse remodeling (dilated LV)...It hppened in my case "Chronic hypertension, congenital heart disease with intracardiac shunting, and valvular heart disease may also lead to remodeling.
The etiology would be if the carotid bodies sense a decrease in blood pressure they send a message to increase the heart rate and stroke volume of the heart. If the pressure increases, they tell the heart to slow down. This is why a person can press on specific areas of the neck and have a response in their heart. This procedure, called carotid massage, can induce changes in blood pressure and can even cause a person to stop having an arrhythmia, or irregular heart beat.
I don't know if the underlying mechanism is anxiety driven hypersensitivity or an increase in stroke volume or BP but breathing techniques work for many people. (2) Weight loss to reduce the burden on your heart MAY help - will only work if you're overweight to start with - if you are not overweight and have a structurally normal heart and regular BP then the pounding is likely caused by your unique physiology (placement of heart within chest etc).
It may be a medication which slows your heart rate down and so makes your heart beat seem more perceptible because each heart beat then has to contribute a larger stroke volume. I would make sure that you get an EKG and if there are no notable arrhythmias such as PVCs or SVT, as these are other possibilities for your symptoms. If you continue to have these symptoms then you also may need a Holter monitor.
It is important however that the stroke volume of the heart is sufficient to keep your blood pressure up. That would be a totally different story.
Second, the Cardiologist needs to decide the best options for as much recovery as possible. If the stroke volume has become stable at 25% and reasons are unknown, it is likely through infection and recovery will start when it's under control. Medication is available to make the heart muscle feel more comfortable. Virtually every case of heart failure is different, so the outcome is not possible to state, especially with such little information.
If you were nervous or stressed out than that can cause your heart to beat faster and more powerfully (stroke volume increases) and it makes much more obvious. Again, perfectly normal and nothing to be concerned over.
i think i have impending stroke because my ears ring...and sometimes can hear my heart beat when laying down in ears..so im like great the arteries are hardening around ears then when im a PREGNANT...Boom!! stroke see ...,im scared and dunno how to relax ps. im 5'5.5 and 145-150 pounds..
The brady-cardiac response to exercise can be due to increased stroke volume and also reflective of improved exercise economy, but that can be ruled out as the post suggests physical fitness is not a consideration. The mechanism regulating exercise induced bradycardia is not thoroughly understood, but may be related to a change in the balance between the sympathetic and parasympathetic activity.
The only way to keep co up is via increased sv or hr. So basically co( cardiac out put)= stroke volume ( amount of blood for each pump) x heart rate. I think in your case totally benign.
Up until two months ago, he was very active physically -- golfing on a regular basis, bowling, walking, gardening. Then he started having symptoms of weakness. Several weeks ago, he suffered a stroke. The stroke was due to a clot from his heart, and caused loss of speech (or rather, vocabulary). Within a few days, his speech was almost back to normal. The echocardiogram after the stroke indicates that he needs a mitral valve replacement due to stenosis.
It is just not fast enough to perfuse the body. Your cardiac output is your stroke volume times your heart rate. If your stroke volume is very high, but your heart rate is too low, your CO will still be too low for your body. This has to be checked by a doctor. Let us know how it goes.
For some insight, the heart problem may be secondary to the kidney disorder. If there is an overload of fluids (volume) that condition will/can overwork the heart and as a result the heart becomes weak and almost always the heart size will increase. The 15% of blood pumped into circulation with each heart stroke can back up the blood received from the lungs and fluids can leak into lung tissues and cause congestion...