Stroke volume changes during exercise

Common Questions and Answers about Stroke volume changes during exercise


Avatar n tn _ Dear Pat, thank you for your question. 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.
Avatar m tn the same MAP regardless of if heart rate is 100 and stroke volume 100 ml, or the heart rate is 50 and stroke volume 200 ml, the same is not true for pulse pressure (sys minus dia). While the first might have a blood pressure of 140/90 and a MAP of 105 mmHg, the latter may have a blood pressure of 180/70 and the same MAP. Everyone have their unique stroke volume:pulse pressure ratio, depending on arterial compliance/stiffness. In general, a lower number may indicate higher arterial stiffness.
Avatar m tn 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.
Avatar n tn Posted By Pat on August 20, 1998 at 09:43:30: I had a cardiopulmonary exercise stress test and went back for the results, I had gotten info from you re the VO2max numbers so I could try to understand what the doctor would tell me, instead the doctor said they measured the stroke volume and mine was "16" which he thought was low, what does this 16 mean, what would an average number be for a 55 year old female?
1124887 tn?1313754891 EF is a compensating factor and helps maintain a balancing flow of blood between the right and left side of the heart. Stroke volume is inverse to the heart rate. Slow heart rate the greater the stroke volume which indicates the heart rate is also a compensating factor...the slower the heart rate the more time to fill. Wide pulse pressure (no medication, etc) can be the outcome of increased CO due to fitness, anxiety, hyperthyroidism, etc.
1124887 tn?1313754891 I have average exercise tolerance. I also know my heart is on the small side so my stroke volume is probably not that great compared to an athlete. So, I think if you conditioned yourself your LVEF would probably stay the same. This is because all the factors in the equation should in theory increase at the same rate therefore the measurement will stay the same. However the stroke volume and cardiac output measure would increase.
Avatar n tn So I am thinking that I am just very deconditioned and my stroke volume is low and I need to wait for changes in muscle growth and circulation in my legs too. Am I too old to really increase my heart efficiency and stroke volume now?
Avatar m tn 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.
Avatar m tn Muscles are in use, the GI system is working and moving, the mechanisms for regulating blood pressure does changes with changing body positions, stress levels, etc. And the heart constantly changes its stroke volume and heart rate, and changes can feel like something is too tight, the heart jumps out of the chest, or other terminology that people use to describe this sensation. They can all cause chest pain of variable degree and location.
Avatar n tn For a more definitive measurement a right heart catheterization is necessary because the exercise echocardiogram has limitations, namely the inability to measure left-sided filling pressures and cardiac output (stroke volume) that is in part needed for evaluation.....
Avatar m tn It's been 2yrs since my stroke and I have no voluntary movement in my left arm or hand. Is there any possibilty that i could recover any movement? My neurlogist told me that if within 6month of the stroke if I didnt have any movement that my hand will stay paralyzed?
Avatar n tn 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.
Avatar n tn i have been suffering from shortness of breath for 5 months.recently i have a echocardiogram. it shows that my stroke volume is 47 ml . is this is a normal value or it is a sign of a heart disease? my ef is 61%.
Avatar n tn These risk factors are tied to hormonal fluctuations, changes in blood volume, tendency to form blood clots, and other physical changes that affect a woman in different stages of life." Go through this link for some more info You need to be closely observed as you are nearing due date. Take care and share your thoughts.
Avatar f tn , Some risk factors for stroke apply only to women, including pregnancy, childbirth and menopause. These risk factors are tied to hormonal fluctuations, changes in blood volume, tendency to form blood clots, and other physical changes that affect a woman in different stages of life." Go through this link for some more info You need to be closely observed . Follow up your neurologist regularly. Take care .
11478709 tn?1526751275 Hi Irakli. Greek-Cypriot background perhaps? Your skating sessions are presently likely causing lactic acid to build up to a level where it causes vasodilation ( blood vessels get dilated) so there's sustained higher blood flow, less blood volume in the heart, thus lower blood pressure. Also the increased heat generated by the exercise, causes dilation of blood vessels in turn as a compensatory mechanism to lower heat, this too contributes further to lowering blood pressure.
Avatar n tn Return of systemic blood to the heart is impeded by the pressure inside the chest. The output of the heart is reduced and stroke volume falls. This occurs from 5 to about 14 seconds in the illustration. The fall in stroke volume reflexively causes blood vessels to constrict with some rise in pressure (15 to 20 seconds). This compensation can be quite marked with pressure returning to near or even above normal, but the cardiac output and blood flow to the body remains low.
Avatar n tn I think in laymans terms, an area of the heart was found to have insufficient oxygen during exercise, but was fine during rest. Another area was found to have insufficient oxygen at both rest and exercise, which usually means dead tissue. However, they believe this is probably a scanner problem, so a PET scan is recommended to end the confusion. Reversible ischaemic changes means the oxygen is too low for exercise in a given area of heart muscle, but adequate when you are resting.
Avatar n tn I'm 46 years old and have been told by my doctor I have a slightly enlarged heart and 2 enlarged valves. I've never smoked, don't do drugs,I drink socially although that is limited because I only have 1 weekend off a month and I don't drink during the week. I exercise (lift weights, not much cardio) 3 days a week, and have a job that keeps me active. I am in pretty good shape, 6'2" and 200 pounds. I was just wondering, what causes this in an otherwise healthy person?
Avatar m tn HI, I am a relatively healthy 22 year old that runs 3 miles 5 days a week at an 8 min/mile pace. My normal blood pressure and resting heart rate are 118/76 and around 50 BPM. My question is more for my general knowledge because I can't seem to find a solid answer. Specifically, what exactly happens to one's blood pressure during exercise? I took my blood pressure within one minute of my run today and it was 103/58 and 139 BPM.