Can defibrillation work on a completely stopped heart?

  • Thread starter Thread starter fawk3s
  • Start date Start date
  • Tags Tags
    Heart
Click For Summary
SUMMARY

Defibrillation is ineffective on a completely stopped heart, known as asystole, as there are no electrical impulses to convert. The primary purpose of defibrillation is to correct ventricular fibrillation, which involves disorganized electrical activity. In cases of asystole, the recommended approach is to use an internal (transvenous) ventricular pacemaker or external (transcutaneous) pacemakers, along with drug administration to optimize conditions for restarting the heart. Repeated defibrillation attempts in asystole are futile and can delay more effective treatments.

PREREQUISITES
  • Understanding of cardiac rhythms, specifically ventricular fibrillation and asystole.
  • Familiarity with defibrillation techniques and their applications.
  • Knowledge of pacemaker types, including internal (transvenous) and external (transcutaneous) pacemakers.
  • Basic pharmacology related to cardiac resuscitation drugs.
NEXT STEPS
  • Research the mechanisms of ventricular fibrillation and how defibrillation restores normal rhythm.
  • Learn about the indications and contraindications for using transvenous and transcutaneous pacemakers.
  • Study the pharmacological agents used in cardiac arrest scenarios and their roles in resuscitation.
  • Explore advanced cardiac life support (ACLS) protocols for managing asystole and other cardiac emergencies.
USEFUL FOR

Medical professionals, emergency responders, and anyone involved in cardiac care or resuscitation efforts will benefit from this discussion.

fawk3s
Messages
341
Reaction score
1
I had this first-aid lecture today, and something I heard got me confused.

So the lecturer said that the "peeeeeeeep" and no electrical impulses being read by the electrocardiograph and the doctors continuing to defib the patient in the movies is basically wrong. That there ought to be some sort of electric pulses for the defib to work.
Now I knew that defibs were used to correct the hearts rythm, but what I can't comprehend is why wouldn't in work if the heart had stopped completely? Because I've always thought it would.

Thanks in advance,
fawk3s
 
Biology news on Phys.org
fawk3s said:
I had this first-aid lecture today, and something I heard got me confused.

So the lecturer said that the "peeeeeeeep" and no electrical impulses being read by the electrocardiograph and the doctors continuing to defib the patient in the movies is basically wrong. That there ought to be some sort of electric pulses for the defib to work.
Now I knew that defibs were used to correct the hearts rythm, but what I can't comprehend is why wouldn't in work if the heart had stopped completely? Because I've always thought it would.

Thanks in advance,
fawk3s

It's called defibrillation because it can convert ventricular fibrillation to a functional rhythm. Fibrillation is localized disorganized activity of the heart muscle which does not produce effective pumping action.

The true "flat line" ECG rarely, if ever, responds to external defibrillation. There's nothing there to convert. The most effective treatment, when possible, may be to install an internal (transvenous) ventricular pacemaker via a right arm (brachial)vein, right jugular vein or the right femoral vein from the groin area. Of course it doesn't always work since a flat line ECG (asystole) has a very poor prognosis, but it's better than wasting time by repeatedly trying to defibrillate a heart that's not fibrillating. Drugs are administered to optimize the environment for restarting the heart. There are also external (transcutaneous) pacemakers that can be tried.
 
Last edited:

Similar threads

Medical Brain Death and Revival: What Happens When the Heart Stops Beating?
  • · Replies 4 ·
Replies
4
Views
12K
Medical Electrical stimulation of the Vagus nerve may relieve treatment-resistant depression
  • · Replies 1 ·
Replies
1
Views
3K
4 of 4 models of automated blood pressure cuffs fail to read my BP
  • · Replies 13 ·
Replies
13
Views
1K
Medical Potassium Deficiency: Signs, Causes & Treatment
  • · Replies 23 ·
Replies
23
Views
24K
How can I stop my chronic sleep deprivation?
  • · Replies 5 ·
Replies
5
Views
3K
What Makes Certain Places Hold a Special Place in Our Hearts?
  • · Replies 3 ·
Replies
3
Views
3K
Medical Why do people faint when getting blood drawn?
  • · Replies 20 ·
Replies
20
Views
325K
My approach to physics seems pointless.
  • · Replies 16 ·
Replies
16
Views
3K
Programs What can I do with a Chemistry BS and a minor in Physics?
  • · Replies 1 ·
Replies
1
Views
2K
Studying How Can I Improve My Physics Study Methods at University?
  • · Replies 5 ·
Replies
5
Views
2K