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Doctor insights on: Can You Explain Cardiac Output Monitoring

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Can you explain cardiac output monitoring?

Can you explain cardiac output monitoring?

Most common method: Cardiac output is basically the amount of blood the heart pumps over a unit of time, usually measured in liters per minute. When divided by the heart rate, one gets a stroke volume calculation, or milliliters per beat. All these may be corrected for your body size for comparison with "normals". The most common technique is with thermodilution catheters, but non-invasive techniques are validated. ...Read more

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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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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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Can you tell me what occurs to heart rate, stroke volume and cardiac output during exercise?

Can you tell me what occurs to heart rate, stroke volume and cardiac output during exercise?

All increase: Exercise causes an increased demand for blood flow to provide oxygen to the muscles doing the work. This is accomplished by increase in heart rate and stoke volume. Since cardiac output is determined by heart rate and stroke volume, it also goes up. Blood pressure also typically increases with strenuous exercise. ...Read more

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How high would your heart rate have to be to cause cardiac arrhythmia or cardiac arrest?

How high would your heart rate have to be to cause cardiac arrhythmia or cardiac arrest?

Depends...: There are heart rhythmn disorders that do not begin with an elevated heart rate. Not all cardiac arrhythmias are due to an elevated heart rate. There are rhythmn disorders that have a normal heart rate or even a slow heart rate. A normal or slow heart rate does not rule put an arrhythmia. ...Read more

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Can you tell me more about cardiac output in patient with dilated cardiomyopathy?

Can you tell me more about cardiac output in patient with dilated cardiomyopathy?

Typically decreased: Dilated cardiomyopathy in the classic form has greatest effect on the left ventricle, which is responsible for pumping blood to the body. In dilated cardiomyopathy, the muscle that makes up the left ventricle is weaker than normal and has less reserve. Therefore, typically, the cardiac output is less than normal and the ability to increase cardiac output for exercise is blunted. Meds can help. ...Read more

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How do you ?Measure cardiac output?

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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Can you define cardiac output and ejection fraction?

Related: Cardiac output is the amount of blood pumped out by heart in each minute (typically around five liters per minute). Ejection fraction is the fraction of blood that heart recieves in each heart beat that is pumped out (typically 55-65% being normal). ...Read more

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Can you tell me how propofol may cause heart dysfunction leading to cardiac arrest?

Can you tell me how propofol may cause heart dysfunction leading to cardiac arrest?

Anesthesia: Propofol is an anesthesia. It goes to the brain, and depresses the breathing center. This causes hypoxia to all tissues including the heart. The hypoxia also causes acidosis from anaerobic respiration, and vasodilatation and drop in bp. This all lead to hypoxia of tissues including heart muscles, and eventual death of tissues. ...Read more

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Can you describe cardiac catheterization?

Can you describe cardiac catheterization?

See Below: Usually, sedation is given - a 2mm incision is made in the femoral artery at the groin, a sheath is inserted, the artery is cannulated with a catheter, dye is injected via catheter to provide contrast so that the cardiologist can read the images via fluoroscopy (x-ray).The injection of dye is repeated to attain images of the heart from enough angles to provide a complete 'picture' of coronaries. ...Read more

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How can an increased cardiac output help exercise?

How can an increased cardiac output help exercise?

Exercise increase CO: Exercise increases cardiac output as it usually increases both heart rate(hr) and stroke volume (sv) (amount of blood ejected by the heart in each beat) as cardiac output (co) = hr x sv. It is a compensatory mechanism to keep up with the demands of oxygen by the body doing exercise. If the cardiac output would not increase, the body would not be able to perform for long. ...Read more

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How can I find stroke volume and heart rate given cardiac output equation?

How can I find stroke volume and heart rate given cardiac output equation?

SVxHR=CO: You can count your heart rate by taking your pulse. That's the easy part. To get SV, you can do an echo to estimate it or do a right heart catheterization and perform a thermodilution and Fick measurements. (That's how cardiologists obtain it), ...Read more

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Can you tell me how could decreased lung expansion affect cardiac output?

Venous Return : The venous return to the heart depends on the expansion of the lung, the deeper the breath; the more blood will be returned to the heart. ...Read more

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Can you please define normal heart rate and with high BP heart rate?

Can you please define normal heart rate and with high BP heart rate?

Heart rate: The normal range of resting heart rate is considered 60-100, but many people have lower heart rates than that and are in good health. Physical fitness like running, cycling, swimming often leads to lower hr and some people are normal even in the 40's range. If you have high bp, some meds lower the hr, such as beta blockers. ...Read more

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What will happen if cardiac output decreases?

What will happen if cardiac output decreases?

Cardiac Output: This is the amount of blood the heart pumps. If it decreases but is still adequate for the demands of the body, nothing much will happen. If it decreases below the metabolic demands of the body, organ dysfunction and shock will occur if the output level is low enough. ...Read more

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What will happen if cardiac output decreases?

What will happen if cardiac output decreases?

Cardiac Output: This is the amount of blood the heart pumps. If it decreases but is still adequate for the demands of the body, nothing much will happen. If it decreases below the metabolic demands of the body, organ dysfunction and shock will occur if the output level is low enough. ...Read more

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Why would a patient in renal failure get decreased cardiac output?

Why would a patient in renal failure get decreased cardiac output?

Complex: Even though the mechanisms are complex, one way to understand is that if you lose the ability to filter your blood and eliminate extra fluid from your body (one of the kidney's main functions) your heart will be burdened with pumping a lot more blood than it was intended to do and will therefore fatigue and not pump as well (same as any other muscle would if forced to work "overtime"). ...Read more

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Dr. Tiffanie Noonan
5 doctors shared insights

Cardiac (Definition)

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