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Doctor insights on: What Are The Causes Of High Cardiac Output

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What are the causes of high cardiac output (over 11) with normal BP (120s/70s) and what are the implications for health & pregnancy.

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

Dr. Cynthia Archer
918 doctors shared insights

Cardiac Output (Definition)

Cardiac output is a measurement of the amount of blood a person's heart can pump out during a set amount of time. The measurements help doctors figure out how strong or weak ...Read more


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What happens to cardiac output and after load when heart rate is low? Does it increase because high heart rate causes decrease in CO

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.: BUT in a young healthy person, generally the heart rate is low because the heart is efficiently pumping and the cardiac output is good. Generally, (in normals), increasing the heart rate increases pumping and cardiac output. ...Read more

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What are signs of high cardiac output?

What are signs of high cardiac output?

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

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What happens when you have low or high cardiac output?

What happens when you have low or high cardiac output?

Fatigue: Low cardiac output will lead to fatigue and shortness of breath. High cardiac output failure caused by severe anemia or paget's disease have similar manifestation. ...Read more

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What happens to the body when cardiac output is low and high?

What happens to the body when cardiac output is low and high?

Cardiac output: Low cardiac output has low bp, high heart rate, cold, clammy, impaired mention, may be short of breath, decreased urine output. High cardiac output usually the obverse with warm, bounding pulses, increased BP may have increased urine output. ...Read more

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I'm curious what could happen when cardiac output is low and what if it's high?

I'm curious what could happen when cardiac output is low and what if it's high?

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

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Can being a prior endurance athlete (but not currently trained) permanently affect cardiac output resulting in high numbers when all else is normal?

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

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How can decreased cardiac output be caused by abnormal fluid volume?

How can decreased cardiac output be caused by abnormal fluid volume?

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

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How can decreased cardiac output be caused by increased fluid volume?

How can decreased cardiac output be caused by increased fluid volume?

You have it reverse: Heart rate x stroke volume = cardiac output and thus if stroke volume decreases, cardiac output decreases or if heart rate decreases cardiac output decreases. ...Read more

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How is decreased cardiac output caused by increased fluid volume and decreased fluid volume?

How is decreased cardiac output caused by increased fluid volume and decreased fluid volume?

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

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How can decreased cardiac output be caused by either increased fluid volume and decreased fluid volume?

How can decreased cardiac output be caused by either increased fluid volume and decreased fluid volume?

Cardiac output: When systolic dysfunction is present, volume overloading can result in decreased stroke volume and cardiac output. In any cardiac status, decreased intravascular volume will result in decreased cardiac output. ...Read more

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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

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

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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.

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.

Cardiac output: Your measured cardiac output is high for someone at rest, but not at all if you do any exertion or are under stress. Co can reach 15 l/min in healthy men without any difficulty. ...Read more

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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

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

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Does decrease cardiac output cause a decrease in blood flow to the kidneys?

Does decrease cardiac output cause a decrease in blood flow to the kidneys?

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

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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

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What's cardiac output?

Heart pump volume: The cardiac output is the volume of blood per minute pumped by the heart. Cardiac output is equal to heart rate multiplied by stroke volume (the volume of blood ejected with each heartbeat). ...Read more

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Can you define cardiac output?

Can you define cardiac output?

Cardiac output: Stroke volume times heart rate equals cardiac output. Stroke volume relates to myocardial contractility, vascular resistance, vascular volume, anemia and metabolic state. There are subcomponents to all of these. ...Read more

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What influences cardiac output?

What influences cardiac output?

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

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How is cardiac output calculated?

How is cardiac output calculated?

Indirectly: Indirectly, by equating the right cardiac output with the left cardiac output and putting a swan ganz catheter into the pulmonary artery. Or calculating the difference between the arteriol and venous oxygen content; this is called the fick formula. ...Read more

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Is cardiac output the same as ef%?

Is cardiac output the same as ef%?

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

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What is an average cardiac output?

What is an average cardiac output?

5 L per minute: The average cardiac output is somewhere around 5 l per minute. Cardiac output varies with the size of the patient (larger patients have larger cardiac output). Cardiac output is increased in conditions such as fever, anemia, or pregnancy. ...Read more

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What could increase cardiac output?

Cardiac output: Basically an increase in demand for oxygen by the body. This may be physiological (exercise) or pathological (sepsis — infection — fever) or increased metabolism (hyper active thyroid gland — hyperthyroidism) or abnormal conducts (shunting of blood). ...Read more

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When could cardiac output decrease?

When could cardiac output decrease?

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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How do you? Measure cardiac output?

Several: Can use 2d echo, mra of heart, and right heart cath. Cardiac output is the measure of how many liters per minute the blood is being circulated in the body. ...Read more

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What is cardiac output influenced by?

Disease & more: Congenital heart disease, vitamin b1 defiency, anemia, thyroid problem, renal disease, liver disease, brain disease, vascular disease, blood disease, atherosclerosis, valve disease — these are the biggest influencers of cardiac output. ...Read more

Dr. Adam Lewis
5 doctors shared insights

Cardiac (Definition)

Cardiac translates literally to "heart, " and any place the term is seen, such ...Read more