Stroke volume with exercise

Common Questions and Answers about Stroke volume with 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 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 So a parameter that increases volume will increase blood flow and the stroke volume is increased with an increase in contractility. Higher EF stronger contractility. The converse is true a reduction in volume the lower the contractility and lower stroke volume. Your question seems to be addressing the control factors to maintain integrity of a balance of blood flow between the left and right side of 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.
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 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 m tn 8cm systolic diameter, 22% FS, 117ml diastolic volume, 56.2 ml systolic volume, EF% 52, Stroke Volume 60.8, LVPW thickness .82cm, IVP thickness .88 So, my questions are the following: -Can you have some form of systolic dysfunction without ending up with an enlarged heart or an EF% lower than 50? -Could I have systolic dysfunction that is being controlled by my exercise, which is why I have been able to have an EF% in the low 50’s and no structural remodeling?
Avatar m tn A faster heartbeat does not provide enough time to fill as at rest, and the timing of contractions are less. The percent of blood pumped with each heartbeat is less reducing stroke volume (lower EF). The heart rate has increased to provide the necessary blood/oxygen to meet the system's demand for the diminished stroke volume. The CT scan indicates there is substanital soft plaque buildup within the linings of the vessels.
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 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 n tn For some insight pulmonary artery pressures (PAP) paramenters: As you know there is an exercise and resting parameters for pulmonary arterial hypertension (PAH). The exercise parameter has a mean (average) ≥ 25 mm Hg at rest and 30 mm Hg with exercise. However, making the diagnosis of PAH can be difficult.
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.
20814293 tn?1519959769 I am a 64 year old female who was recently diagnosed with an exercise induced left bundle branch block during a treadmill stress test. A nuclear non treadmill was done the next week. My ejection fraction was 84%, The ekg was inconclusive due to baseline ekg changes, and LVH was written next to the ekg result area. The nurse who called said there is nothing to worry about, as no blockages were detected.
Avatar m tn t considering how volume is measured, my reference and I question how two back to back echos (6 months apart) has stroke volume 56 ml and EF is 30% with an Aug. echo... 39 ml stroke volume and EF 30%. Not cath vs. echo discrepancy...regardless the dynamics are volume based, and the EF is the percent of volume ejected with each stroke.
Avatar m tn What does change is the diastolic volume in the ventricles, which tends to decline with age. Now, obviously at 15% EF you would be considered to be in systolic heart failure. Your stroke volume (the amount that gets pumped out to the body with each beat) should be above 50mL, so at 15% it would be virtually impossible to reach this healthy stroke volume minimum unless you had an insanely high LVEDV. You'd have to have 333.
Avatar n tn I don't think its the Toprol that is causing your decreased heart rate. I feel it reduces mine by maybe 10 bpm at the most at the 25 mg dosage. The prescribing info claims 14% reduction for a 50 mg dose, the lowest tested. Its commonly prescribed as high as 200 mg, so our 25 mg is very low. For what its worth, the effect of beta blockers seems to wear off with me as I run further.
Avatar n tn 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%.
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%.