A member asked:

Why doesn't tachycardia always affect cardiac output?

A doctor has provided 1 answer
Dr. Frederick Tibayan answered

Specializes in Thoracic Surgery

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.

Answered 3/29/2015

3k views

Thank

Related Questions

A member asked:

Does sinus tachycardia increase your probability of a sudden cardiac arrest?

2 doctors weighed in across 2 answers

Online Primary Care Doctors Accepting New Patients

$44 video appointments available today with a membership as low as $15/month

Book a Video Appointment
Ask your question
Didn't find what you're looking for?

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.

Ask your question