Stroke volume and blood pressure

Common Questions and Answers about Stroke volume and blood pressure


1591333 tn?1297733419 For instance heart failure increases blood volume and the kidneys react as if the individual is losing blood...the increase of volume further distresses the heart and kidneys continue to believe the system is losing blood. Also, the heart rate and dilation of the heart will continue to rise with a low cardiac output.
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 n tn CO (volume of blood pumped with each heartbeat) there is a variation of volume of blood pumped with each stroke to maintain a balance between left and right side blood flow) and abviously PAP will vary accordingly (stronger heartbeat,higher PAP. If there are blockages (clots) in the lungs or pulmonary artery (increase of resistance the heart pumps against, and/or if there is narrowing, stiff pulmonary vessel the more resistance (increase of resistance will cause higher PAP).
Avatar m tn This increases right atrial pressure, right ventricular end-diastolic pressure and volume. This increase in ventricular resistance increases ventricular stroke volume by the Frank-Starling mechanism (phenomonon increases stroke volume with increasing chamber diameter...if not properly treated the chamber size will increase to a degree that causes EF of the ventricle to drop into the heart failure range.
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 When medication(s) is properly administered there should be a reduction of heart rate and blood pressure, and it appears you are overdosed and it is surprising you still have high blood pressure and heart rate!!?. Another response, QUOTE: "A rapid heart rate with LOW blood pressure could be a sign of heart failure, but in your case, I would guess (I'm no doctor) that your heart is fine." Probably not revelant but what is the etiology of the comment?
907968 tn?1292622204 A healthy cardiovascular system will raise the pulse pressure (PP) with exercise (more forceful contractions and increase in blood volume per stroke) destinquished by the increased systole metric and diastole stays about the same. There is a return to normal PP (about 40) in several minutes. The following supports a change in blood pressure with a heart attack (stroke volume is decreased). " In trauma a low or narrow pulse pressure suggests significant blood loss.
Avatar m tn CO is a product of blood volume per heart stroke and heart rate. The higher/better the stroke volume (weak, strong, stronger contractions) the fewer heart beats (more for weak, less for strong, least for stronger) are required to meet demand (held constant for illustration) for blood oxygen. A well-condition individual requires fewer heartbeats due to strong contractions. It is the stroke that determines EF...not the CO, as CO can vary by an increase or decrease of HR.
487969 tn?1249313291 My blood pressure is just like yours! I used to be ~120/88 or something, but now I'm around 98/65. I thought this was significant--or at least a clue--in figuring out what was wrong with me since this was a significant drop in pressure that has remained constant. But of course, the doctors don't seem to care.
Avatar m tn For a perspective, diastole dysfunction compromises left ventricle filling volume, inadequate stroke volume and operating at a high pressure regimen. LV filling volume is reduced due to increased wall size crowding out available space. Inadequate stroke volume is usually due to wall thickening and stiffening and loss of elasticity. High pressures can dilate upper chamber to compensate for gradient pressure across the mitral valve. That is the pathology.
1527234 tn?1291771442 In this phase due to F/S phenomonon the ventricular myocardium is no longer able to contract adequately to compensate for the volume overload of mitral regurgitation (volume overload can be do to other causes), and the stroke volume of the left ventricle will decrease. The decreased stroke volume causes a decreased forward cardiac output and an increase in the end-systolic volume dilates left ventricle.
Avatar n tn Consequently if he is losing a lot of water via perspiration, then he is losing his fluid volume, which will lower his blood pressure, because low volume means low pressure. If he is not experiencing heart palpitations, which can be caused by low potassium, then I would just suggest drinking gatorade while playing golf. Also, is he on a low sodium diet? If so, then that would further put him at risk for hyponatermia. Is he on a diuretic?
Avatar n tn After reading an article on postural orthostatic tachycardia syndrome, I discovered dehydration leads to low blood volume which causes low blood volume which lowers blood pressure and the heart increases rate significantly to supply blood to the entire body. BINGO! I immediately started drinking 2 liters water (distilled) in addition to my others liquids which were primarily limited to coffee, water with meds and exercise, and a few beers.
Avatar n tn This is normal in most cases, it is similar to postural hypertension in which the sudden act of standing can increase one's blood pressure and heart rate. If you are otherwise healthy, a heart rate in the upper 50s is a sign of a very efficient heart. Ask your doctor to be safe.
Avatar m tn We all have our unique relationship between cardiac stroke volume and pulse pressure (with age, pulse pressure:stroke volume ratio tends to decrease), but in young healthy males it can be approx. 1.7. Which means, if your pulse pressure is 80 mmHg, stroke volume may be 136 ml. When I'm exercising at peak intensity, my blood pressure is approx. 200/70 mmHg. Which means, my heart is pumping lots of blood for each heart beat. It's really that simple. Your heart beats with high force.
Avatar n tn RBC count measures the number of red blood cells in a volume of blood and usually ranges from 4.2 to 5.9 million cells per cmm. RBC decreases with anemia; increased when too many are made and with fluid loss due to diarrhea, dehydration, burns. Hgb measures the amount of hemoglobin molecule in a volume of blood and usually measures 12 to 16grams per deciliter (one-hundredth of a liter) for women. Hgb mirrors RBC results.
Avatar n tn There is a breathing, pressure, and blood volume relationship. During normal breathing there is a pressure and volume relationship so when the increase in the effort to breathe that can cause an overdistention of the lungs and prevent an acceptable measurement of pulmonary pressure. There may be other obstructive causes, etc. Hope this helps.
Avatar n tn Mostly my Dr wants me to go on all the designer drugs for Cholesterol and high blood pressure. I would rather lose some weight and get things back on track. I am over weight but I am not "huge". I carry a lot of weight in my stomache and chest as a typical type 2 diabetic. My question is can an enlarged heart be reversed?
Avatar m tn Calcification is an abnormal buildup of the substance that decrease the blood flow and increases pressure within the left ventricle hat can cause the LV to enlarge. Tortuosity of the aorta is an abnormal twisting and turning of the vessel. It can/will reduce blood flow with each stroke volume of the heart causing the heart to work harder to meet the system demand for blood/oxygen. Worst case scenarios.
Avatar m tn Usually, blood pressure is assessed with multible heart cycles at least for a minute, and that would then include the heart rate. The etiolgy of a serious valve disorder would be to reduce the cardiac output (CO is stroke volume for each heartbeat times heart rate). Under other physiological conditions, there would be an increase in heart rate and increased blood pressure. "Increased HR leads to increased cardiac output, among other things, which increases blood pressure".
Avatar n tn 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%. Do you have any heart valve regurgitation (leakage)?
Avatar f tn 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.