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Related Concept Videos

Factors Influencing Heart Rate01:30

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The heart rate, or pulse rate, is a vital indicator of cardiovascular health. It reflects the number of times the heart beats per minute. Various physiological and environmental factors influence heart rate, increasing or decreasing cardiac output. Understanding these factors is crucial for assessing heart function and identifying potential health issues.
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Cardiac Output I:Effect of Heart Rate on Cardiac Output01:19

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Cardiac Output
Cardiac output (CO) refers to the total amount of blood ejected by one of the ventricles in liters per minute (L/min). In a resting adult, CO ranges from 5 to 6 L/min, adjusting according to the body's metabolic requirements.
Effect of Heart Rate on Cardiac Output
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CNS stimulants, such as cocaine, amphetamines, and cannabinoids, have varying structures and mechanisms of action that lead to different therapeutic effects and side effects. Cocaine, with its molecular formula C17H21NO4, is a tropane alkaloid and a tertiary amino compound. It has two chemical forms: the hydrochloride salt and the "freebase." The former is in powder form, while the latter involves removing the hydrochloride salt to create a form that can be smoked. Cocaine exerts its...
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Decreased pulse rate01:14

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Bradycardia is a medical condition in which the heart rate is slower than normal. It occurs when the heart's natural pacemaker, the sinus node, generates slower electrical impulses than the standard rhythm. In adults, bradycardia is diagnosed when the pulse rate falls below 60 beats per minute, indicating a deviation from the normal heart rate range.
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Related Experiment Video

Updated: Dec 7, 2025

Brain Morphology of Cannabis Users With or Without Psychosis: A Pilot MRI Study
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Brain Morphology of Cannabis Users With or Without Psychosis: A Pilot MRI Study

Published on: August 18, 2020

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Differences in heart rate among recent marijuana use groups.

Larry Keen1, Antonio Abbate2, Vernessa Clark3

  • 1Department of Psychology, Virginia State University, Petersburg, VA, USA - lkeen@vsu.edu.

Minerva Cardiology and Angiology
|September 29, 2020
PubMed
Summary
This summary is machine-generated.

Recent marijuana use was associated with a lower heart rate compared to non-users. This suggests a potential compensatory cardiovascular response following cannabis consumption, impacting heart rate regulation.

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Area of Science:

  • Cardiovascular Physiology
  • Cannabis Research
  • Public Health

Background:

  • Marijuana's acute effects on cardiac sympathetic activity are known.
  • Cardiovascular impacts of marijuana use beyond one hour are not well understood.
  • This study investigates heart rate changes in recent marijuana users.

Purpose of the Study:

  • To compare heart rate across different marijuana use groups.
  • To assess heart rate as a marker of cardiac sympathetic activity.
  • To explore subacute cardiovascular effects of marijuana.

Main Methods:

  • Cross-sectional study design.
  • Inclusion of three groups: never users, recent users (past 24 hours), and past-week users.
  • Heart rate assessment at baseline using analysis of covariance.

Main Results:

  • Heart rate was significantly lower in recent marijuana users (62.38 bpm) compared to non-users (73.92 bpm).
  • This difference remained significant after adjusting for demographic factors.
  • Indicates a potential immediate or subacute effect on heart rate.

Conclusions:

  • Marijuana use may trigger a compensatory cardiovascular mechanism.
  • This mechanism appears to result in a reduced heart rate.
  • Further research is needed to fully characterize these cardiovascular effects.