Doctor insights on:
What Are The Causes Of High Cardiac Output
What are the causes of high cardiac output (over 11) with normal BP (120s/70s) and what are the implications for health & pregnancy.
Cardiac output (Q): When q increases in a healthy individual, most is due to an increase in heart rate. Change of posture, increased sympathetic nervous system activity, and decreased parasympathetic nervous system activity can also increase q. When q increases in a healthy but untrained individual, most of the increase is due to >heart rate. See your doctor re: health and pregnancy. This is individual assessment. ...Read more
What happens to cardiac output and after load when heart rate is low? Does it increase because high heart rate causes decrease in CO
Varies: Assuming a true high cardiac output syndrome, patients may feel flushed with a fast heart rate. Most are transient situations, but some illnesses and conditions may cause a sustained high output state, e.g., hyperthyroidism, anemia, arterio-venous malformations (congenital or acquired low resistance connections between arteries and veins), or disease like paget's. Requires confirmation by doctor. ...Read more
Low cardiac output: Cardiac output depends on heart rate and stoke volume. Therefore, the cardiac output increases when heart rate goes up in normal heart. However, when the heart is failing the stroke volume is lower than well as the cardiac out which is called heart failure. Sometimes, heart failure could occur when cardiac output is high due to other medical problems such as a severe anemia, hyperthyroidism, etc ...Read more
Can being a prior endurance athlete (but not currently trained) permanently affect cardiac output resulting in high numbers when all else is normal?
Athletic Heart: Interesting question! Former athletes have been shown to have more left ventricular hypertrophy or thickened hearts that usually lessens with age and deconditioning. A thick heart can lead to poor heart filling by increased stiffness. A condition called diastolic dysfunction. This can lead to a type of congestive heart failure if it persists. Controlling hr and BP via meds can help. ...Read more
Overloading: Low cardiac function may not be able to keep up with too much volume and the fluid backs up in places like the lung, neck, abdomen, and legs. Too much volume can overwhelm a borderline heart already weak. When the heart cannot keep up the needed cardiac output (liters per min) and making the pump work harder increasing pressure inside the heart, and dilating the chamber getting into a bad cycle. ...Read more
Stroke volume: Cardiac output is determined by heart rate and volume of blood pumped by heart in each heartbeat (stroke volume). Increased fluid volume increases the stroke volume and therefore cardiac output. Decreased fluid volume decreases the stroke volume and therefore cardiac output. ...Read more
How can decreased cardiac output be caused by either increased fluid volume and decreased fluid volume?
Which value of cardiac output is considered high? My stroke volume 90ml, by 75 bpm, that means cardiac out:6, 7l/min;cardiac index would be 3, 5l/min*m2. Tx
Cardiac Output: Numbers such as you list can be normal especially in a smoker. Numbers alone without clinical correlation don't necessarily mean a lot. You should discuss these data with the physician(s) who know you and your specifics. ...Read more
Is my cardiac output too high? Results from echo:stroke volume 100ml, by 70 bpm, that means cardiac out:7l/min; cardiac index would be 3, 57l/min*m2.
Clarify:cardiac output too high at rest? Echo:stroke volume 100ml by 70 bpm, that means cardiac out:7l/min; cardiac index would be 3, 57l/min*m2. Txs
High Cardiac Output: Cardiac output is calculated by multiplying stroke volume by heart rate. Since the amount of blood pumped by the heart is dependent on body surface area ie. A larger person needs more blood supply. If it is more than 6l/min in an average person, at rest, and associated with symptoms, the cause must be looked into. ...Read more
Low renal blood flow: Yes, it does. That is why patients with congestive heart failure (chfa) develop edema. The kidney senses this low blood flow and takes steps to increase sodium absorption. This increase in sodium in the body leads to the development of edema. This makes the use of agents that treat this problem necessary. ...Read more
Can congenital heart defects or certain drugs result in increased cardiac output? What else causes it? Mine is 7.2lmin squared.
CO = HR x SV: Cardiac output (co) is the volume of blood pumped per minute, and related to heart rate (hr) and stroke volume (sv) (volume per heart beat). It can be affected by many bodily activities. An increase in either hr or sv can result in inceased co. So any drug that increases hr (caffeine, etc) can result in incresed co. Certain congenital heart defects (such as septal defects) can alter co. ...Read more
Multiple things: Cardiac output is the product of heart rate in stroke volume. Thus, an increase in heart rate results in an increase in cardiac output. Stroke volume can be affected by changes in preload, afterload, and contractility (strength of contraction). Preload is "priming the pump". Afterload is the resistance to ejection during systole (contraction). ...Read more
Related but not the : Same. Co is a mathematical calculation of the amount of blood pump by the left ventricle of your heart in one minute (stroke volume x hr). The ejection fraction is a measurement of the percentage of blood leaving your left ventricle every time contract. Can be measure by 2d echocardiogram, cardiac catheterization, nuclear scan, mri. Hope it help. ...Read more
Low blood pressure: Cardiac output is related to the heart rate, and volume of blood the heart can pump with each heart beat. A low cardiac output occurs when the pump function of the heart is compromised by an event such as a heart attack or when the blood volume is reduced by and event such as dehydration, or bleeding. ...Read more
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