Top
30
Doctor insights on: Fick Equation Cardiac Output Calculator

Share
1

1
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

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


2

2
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

3

3
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

4

4
What could increase cardiac output?

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

6

6
What are normal cardiac output levels?

What are normal cardiac output levels?

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. ...Read more

7

7
Why would someone have low cardiac output?

Why would someone have low cardiac output?

Congestive heart: Failure can be cause of low cardiac output. If the pump is weak and failing then cardiac out put would be low. Very slow heart rate can also result in low cardiac output. ...Read more

8

8
How is cardiac output regulated in the body?

The old way was: Based on oxygen differences from artery to vein called the fick procedure. Then came "thermal dilution", now we can do it by echo. Just plug "cardaic output" into google to learn more. Www. Thepmc. Org. ...Read more

9

9
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

10

10
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

11

11
What is the average number for cardiac output?

What is the average number for cardiac output?

4 to 5 liters/min: Approximately 4-5 l per minute. The cardiac output is proportional to the size of the patient. You can "normalize" the cardiac output by dividing the cardiac output by the body surface area resulting in a "cardiac index". The cardiac index is typically 2-3 l per minute per meter squared. ...Read more

12

12
What are the factors that affect cardiac output?

What are the factors that affect 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

13

13
How could venoconstriction affect cardiac output?

How could venoconstriction affect cardiac output?

Venoconstriction?: Cardiac output is inversely proportional to total peripheral resistance (which is related to mean arterial pressure.) venoconstriction refers to the venous system and can't be measured. If venous return increases, preload increases, and by starling's law of the heart, cardiac output increases. However, severe venoconstriction could eventually diminish venous return and reduce co. Yes? ...Read more

15

15
What happens if cardiac output increases / decreases?

What happens if cardiac output increases / decreases?

Natural: This is the normal pattern of the heart's output based upon the load conditions. The amount of blood filling the heart may vary mildly over time and combined with your level of activity and the force against your heart's ejection of blood (after load) the cardiac output may vary. Most important is that the output does not drop very low as in severe volume loss or weakness of the heart muscle. ...Read more

16

16
I'm curious what occurs if cardiac output increases? What if it decreases?

I'm curious what occurs if cardiac output increases? What if it decreases?

Constantly changing: Your cardiac output (which is the product of stroke volume and heart rate, expressed in liters per minute) is constantly changing in response to your metabolic needs. ...Read more

17

17
How can I maintain cardiac output?

How can I maintain cardiac output?

Exercise: The only way is exercising so your heart can be more efficient. When you exercise your cardiac reserve and stroke volume increase. ...Read more

19

19
How do you calculate? 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

21

21
Will acetylcholine raise cardiac output?

Will acetylcholine raise cardiac output?

No: Acetylcholine neurotransmission has an inhibitory effect on the heart, which lowers heart rate thereby decreasing cardiac output. ...Read more

22

22
How do blood levels affect cardiac output?

How do blood levels affect cardiac output?

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. ...Read more

24

24
What is normal cardiac output during exercise?

>30 liters/minute: Normal resting cardiac output is between 5 and 6 liters per minute
but in very well trained athletes, cardiac output can increase substantially reaching numbers as high as 30 liters per minute. ...Read more

25

25
How could vasoconstriction affect cardiac output?

How could vasoconstriction affect cardiac output?

It lowers it: Vasoconstriction increases the resistance to flow. This is called an afterload. It is like a pump having to pump water up a steep hill; it won't pump as well as on flat land. ...Read more

26

26
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

27

27
Can cardiac output decrease or stay the same at rest?

Falls: When you rest, your heart rate falls, contractility falls, stroke volume falls, and as a result of all of the above, cardiac output falls. ...Read more

29

29
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

30

30
Can you tell me how could an increased cardiac output help exercise?

Can you tell me how could an increased cardiac output help exercise?

Increase O2 delivery: During exercise, the muscles burn more oxygen for fuel. Increasing cardiac output increases the amount of oxygen carried by the blood to the tissues. ...Read more

Dr. M. Hytham Beck
5 Doctors shared insights

Cardiac (Definition)

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