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Doctor insights on: Why Does A Patient In Renal Failure Have Decreased Cardiac Output

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Why does a patient in renal failure have decreased cardiac output?

Why does a patient in renal failure have decreased cardiac output?

Not always related: Renal failure in and of itself is not realted to cardiac output, there are many things that can cause both renal failure and decreased cardiac output, but they are not always related. However if someone has really low cardiac output, one could develop renal failure b/c not enough blood is getting to the kidneys.

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Dr. Tarek Naguib
595 Doctors shared insights

Kidney Failure (Definition)

A condition in which your kidneys suddenly stop working normally. Since your kidneys remove waste products and help balance water and salt and other minerals (electrolytes) in your blood, when your kidneys stop working, waste products, fluids, and electrolytes build up in your body. This can cause problems ...Read more


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For what reasons might a patient in renal failure have decreased cardiac output?

For what reasons might a patient in renal failure have decreased cardiac output?

Direct vs. Indirect: Kidney failure can weaken the heart muscle (uremic cardiomyopathy), but this is pretty rare. A more common problem is fluid accumulation around the heart (pericardial efffusion), which can literally choke the heart (tamponade) but improves with extra dialysis. Or, more likely, the conditions that caused the kidney disease (commonly hypertension and/or diabetes) also are causing heart problems.

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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").

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Why? Would someone in renal failure have decreased cardiac output?

Why? Would someone in renal failure have decreased cardiac output?

Many reasons: Decreased cardiac output can contribute to reduced kidney function. Kidney disease is often associated with heart problems that reduce cardiac output. High blood pressure and volume overload with kidney failure can also reduce heart output. It's often difficult to sort out cause and effect in these situations.

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

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

Other way around: Usually it is the decreased cardiac function that leads to kidney failure due to lack of blood flow. However, the two illnesses in general share many contributing factors like high blood pressure and diabetes.

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What is the life expectancy with a cardiac transplant patient in renal failure?

Cardiac transplant: Transplant survival rates have been improving over the past several years as better options exist in preventing rejection (better than 60% live 10 or more years). Diffuse post-transplant coronary arteriopathy tends to or relate more with late post-transplant events. Coexistant renal failure would also be a negative predictor on survival irrespective of transplant status (mortality 50% at 2 yrs).

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What is meant by decreased cardiac output related to left ventricular failure?

What is meant by decreased cardiac output related to left ventricular failure?

Sick muscle: The heart is supposed to pump out a certain amount with every heart beat, if that amount is too low, e.g. Low out put, the heart muscle is too weak to do it's job (failure).

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What are the signs and symptoms of left sided heart failure associated with decreased cardiac output?

Swelling: The left side of the heart pumps blood throughout your body. When it fails, it decreases blood flow to organs. This can cause kidney injury, liver injury, fatigue, shortness of breath with little exertion, swelling of the feet and legs, fluid build-up in the lungs, and difficulty sleeping flat due to shortness of breath. Medications and diet are important for this disease!

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What are the signs and symptoms of left sided heart failure due associated with decreased cardiac output?

What are the signs and symptoms of left sided heart failure due associated with decreased cardiac output?

Congestion: Breathlessness, especially with exertion. Easy fatigability. Impaired exercise capacity. These are early signs. Without treatment, one becomes short of breath resting, especially when lying down (orthopnea) and at night (paroxysmal nocturnal dyspnea). Eventually the right heart also fails leading to swelling (edema), abdominal fluid (ascites and effusions), and cachexia (wasting).

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What is the relation of hypertension and decreased cardiac output?

What is the relation of hypertension and decreased cardiac output?

Complicated.: It is an indirect relationship. Hypertension over time can lead to changes in the heart muscle and heart function. It may eventually lead to heart failure. When this ensues the output of the heart can eventually decline and cause serious symptoms. In the earlier stages if hypertension cardiac output actually goes up.

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What is the relation of hypertension and? Decreased cardiac output?

What is the relation of hypertension and? Decreased cardiac output?

Hypertension: High blood pressure usually implies an increased peripheral vascular resistance for a time the heart can keep up with the resistance late in the course the heart begins to not be able to generate the stroke volume against the resistance and cardiac output may fall. If abnormal ventricular function is present, cardiac output may fall earlier.

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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.

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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.

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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.

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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.

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I had a stress echo that showed decreased cardiac output with exercise. Anterolateral wall (especially in the neck) hypokinesia. I am 2 years out from my VATS Maze procedure?

I had a stress echo that showed decreased cardiac output with exercise. Anterolateral wall (especially in the neck) hypokinesia. I am 2 years out from my VATS Maze procedure?

These: Findings are more consistent with old myocardial damage (Prior coronary /infarction) than any abnormal rythms Hope this is helpful Consult your Cardiologist for full explanation of the results of this echo. Dr Z

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