Is 'cardiac output' the same as blood pressure?

No. Blood pressure is the force of blood against artery walls, while cardiac output is the volume of blood pumped. They are related but distinct measurements.

What units is cardiac output measured in?

It is typically measured in litres per minute (L/min).

Who would use this term regularly?

Healthcare professionals like cardiologists, intensivists, anaesthetists, nurses in critical care, and exercise physiologists.

Can 'cardiac output' be used in a general, non-medical sense?

Almost never. It is a tightly defined scientific term. In metaphorical use, it would likely be in humour or very creative writing (e.g., 'My cardiac output spiked when I saw the bill').

Is “cardiac output” formal?

Cardiac output is usually technical/specialized in register.

How do you pronounce “cardiac output”?

Cardiac output: in British English it is pronounced /ˌkɑː.di.æk ˈaʊt.pʊt/, and in American English it is pronounced /ˌkɑːr.di.æk ˈaʊt.pʊt/. Tap the audio buttons above to hear it.

cardiac output: meaning, definition, pronunciation and examples

UK/ˌkɑː.di.æk ˈaʊt.pʊt/US/ˌkɑːr.di.æk ˈaʊt.pʊt/

Technical/Specialized

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Quick answer

What does “cardiac output” mean?

The volume of blood pumped by the heart per minute.

Audio

Pronunciation

Definition

Meaning and Definition

The volume of blood pumped by the heart per minute.

A key physiological measurement of circulatory function, representing the product of heart rate and stroke volume, used to assess cardiac performance and systemic perfusion.

Dialectal Variation

British vs American Usage

Differences

No significant differences in meaning or usage. Spelling conventions for related words may differ (e.g., metre/meter).

Connotations

Neutral and technical in both variants.

Frequency

Equally low-frequency and technical in both regions.

Grammar

How to Use “cardiac output” in a Sentence

The patient's cardiac output was measured.A drug to increase cardiac output.Cardiac output (CO) is calculated as heart rate (HR) x stroke volume (SV).

Vocabulary

Collocations

strong

calculate cardiac outputmeasure cardiac outputcardiac output is low/highincrease cardiac outputdecreased cardiac outputnormal cardiac outputcardiac output index

medium

monitor cardiac outputcardiac output falls/risescardiac output determinationmaintain cardiac outputestimate cardiac outputcardiac output measurement

weak

cardiac output dataadequate cardiac outputassess cardiac outputcardiac output studiescardiac output value

Examples

Examples of “cardiac output” in a Sentence

adjective

British English

The cardiac output measurement was taken.
A cardiac-output enhancing drug.

American English

The cardiac output reading was taken.
A cardiac-output enhancing drug.

Usage

Meaning in Context

Business

Extremely rare. Possibly in biomedical investment reports.

Academic

Core term in medical, nursing, physiology, and sports science literature.

Everyday

Virtually never used.

Technical

Fundamental term in clinical medicine, anaesthesiology, cardiology, and critical care.

Vocabulary

Synonyms of “cardiac output”

Strong

CO (standard medical abbreviation)

Neutral

heart outputpump performance

Weak

circulatory volume per minuteminute volume (when specified as cardiac)

Vocabulary

Antonyms of “cardiac output”

cardiac arrest (functional antony, cessation of output)

Watch out

Common Mistakes When Using “cardiac output”

Using it as a verb (e.g., 'The heart cardiac outputs blood').
Confusing it with 'ejection fraction', which is a percentage.
Omitting 'cardiac' and using 'output' alone in medical contexts, leading to ambiguity.

FAQ

Frequently Asked Questions

: No. Blood pressure is the force of blood against artery walls, while cardiac output is the volume of blood pumped. They are related but distinct measurements.
: It is typically measured in litres per minute (L/min).
: Healthcare professionals like cardiologists, intensivists, anaesthetists, nurses in critical care, and exercise physiologists.
: Almost never. It is a tightly defined scientific term. In metaphorical use, it would likely be in humour or very creative writing (e.g., 'My cardiac output spiked when I saw the bill').
: The volume of blood pumped by the heart per minute.
: Cardiac output is usually technical/specialized in register.
: Cardiac output: in British English it is pronounced /ˌkɑː.di.æk ˈaʊt.pʊt/, and in American English it is pronounced /ˌkɑːr.di.æk ˈaʊt.pʊt/. Tap the audio buttons above to hear it.

Learning

Memory Aids

Mnemonic

Think of the heart as a car's engine: its CARdiAC OUTPUT is how much 'fuel' (blood) it pumps out per minute to power the body.

Conceptual Metaphor

THE HEART IS A PUMP (producing an output).

Practice

Quiz

Fill in the gap

In severe shock, a key goal of treatment is to restore adequate to vital organs.

Multiple Choice

What is the standard formula for calculating cardiac output (CO)?