Cardiac Flow

The Cardiac Flow calculator computes the flow factor of an artery based on the diameter and blood flow velocity. 

INSTRUCTIONS: Choose units and enter the following:

• (d) Artery Diameter
• (v) Blood Velocity Magnitude

Cardiac Flow (Q): The flow is returned in milliliters per second (mL/s).  However, these can be automatically converted to compatible units via the pull-down menu.

The Math / Science

The Cardiac Flow calculator computes the flow factor of an artery based on the diameter and blood flow velocity.  The formula for Cardiac Flow is:

`Q = a * v`

with, `a = pi * (d/2)^2`

where:

• Q = Cardiac Flow
• a = arterial area
• d = artery diameter
• v = blood velocity magnitude

Blood Velocity Magnitude

According to a National Institute of Health report, the following information can be considered for velocity magnitude based on age ranges and gender.

Heart and Cardiology Calculators

• Cardiac Stroke Volume: Computes the volume blood pumped in one stroke based on the end diastolic and systolic volumes.
• Cardiac Output: Computes the output of a heart based on the heart rate, end diastolic volume and the end systolic volume.
• Cardiac Output with Stroke Volume: Computes the volume rate of blood pumped by the heart in one minute based on the beats per minute and the stroke volume.
• Ejection Fraction: Computes the Ejection Fraction percentage based on the end-systolic and end-diastolic volumes.
• Heart Stroke Work: Computes the amount of work performed by the heart during a single heartbeat to pump blood based on the Mean Arterial Pressure (MAP) and Stroke Volume(SV).
• Mean Arterial Press: Compute the mean arterial pressure and pulse pressure based on the diastolic pressure and the systolic pressure.
• Cardiac Stroke Work: Computes work done by the ventricle to eject a volume of blood into the aorta based on the afterload pressure, stroke volume, blood stroke mass and blood flow velocity.
• Cardiac Flow (Q): Computes the flow factor of an artery based on the diameter and blood flow velocity.
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