Question 1

how do potassium levels affect cardiac output?

Accepted Answer

Not directly: Cardiac output is the amount of blood flow generated by the heart over a given time frame.  Potassium is a critical electrolyte for body health and cardiac function, especially its rhythm.  Although high or low potassium levels can create major, potentially fatal, irregularities in the heart rhythm, those levels do not directly affect the cardiac output per se.

Question 2

how do blood levels affect cardiac output?

Accepted Answer

Levels = volumes?: Blood levels meaning blood volumes? Cardiac output is the volume of blood being pumped by the heart per minute. It is calculated by stroke volume x heart rate. Stroke volume is the volume of blood pumped from one ventricle of the heart with each beat.

Question 3

what are normal cardiac output levels?

Accepted Answer

5 liters/min: A typical cardiac output is approximately 5 l per minute.  This can vary with the size of the patient with a larger patient having larger cardiac output.  When the cardiac output is normalized for the size of the patient, this is called the cardiac index.  A typical cardiac index would be 2.5.  A number of medical conditions, such as fever or anemia, can increase the cardiac output.

Question 4

my potassium, serum level was marked as low at (3.5.)  i have a cardiac arrhythmia. can this level potassium worsen it?

Accepted Answer

"Normal lab values": A value of 3.5 is "low normal".  If there is a concern for cardiac rhythm disturbances a value of 4.0 is preferred.  Below 3.5 increases risk of arrhythmia.

Question 5

why doesn't tachycardia always affect cardiac output?

Accepted Answer

Cardiac output: is stroke volume times heart rate. if stroke volume goes down more than heart rate goes up, cardiac output won't increase. stroke volume depends on preload (filling of the heart), afterload (resistance to flow), and contractility (how much the heart pumps for how much it is filled. For instance, if the heart rate goes up but the the heart doesn't have time to fill, output won't increase.

Question 6

can you define cardiac output?

Accepted Answer

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.

Question 7

when could cardiac output decrease?

Accepted Answer

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.

Question 8

how do you ?measure cardiac output?

Accepted Answer

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.

Question 9

what factors can affect cardiac output?

Accepted Answer

Cardiac output: In strict physiologic terms, cardiac output is determined by something called stroke volume and heart rate. Heart rate is self-explanatory. Stroke volume is the amount of blood that the heart pumps out with each beat. This in turn is dependent on blood pressure, total blood volume, and how strong the heart contracts.

Question 10

what happen to cardiac output when you exercise?

Accepted Answer

It goes up!: It goes up to make sure there is enough oxygen for the exercising muscles.

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How do potassium levels affect cardiac output

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How do potassium levels affect cardiac output?

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How do blood levels affect cardiac output?

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What are normal cardiac output levels?

A member asked:

My potassium, serum level was marked as low at (3.5.) i have a cardiac arrhythmia. can this level potassium worsen it?

A member asked:

Why doesn't tachycardia always affect cardiac output?

A member asked:

Can you define cardiac output?

A member asked:

When could cardiac output decrease?

A member asked:

How do you ?measure cardiac output?

A member asked:

What factors can affect cardiac output?

A member asked:

What happen to cardiac output when you exercise?

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