What is a Preventricular Contraction??

Question

I had an 24hr ECG done recently and my consultant said that the results showed my heart stopped for several seconds occasionally and I had several preventricular contractions, he didn't explain it fully and now Iam confused..

Answer 1

I have searched out this article from patient's point view so it may help you in understand it, as little knowledge is bad:

Definition of Premature Ventricular Contractions
Premature ventricular contractions (PVCs) are early or extra heartbeats that commonly occur and are usually harmless in normal hearts, but can cause problems in hearts with pre-existing disease.

Description of Premature Ventricular Contractions
Abnormally fast heart rates are classified into two types: supraventricular (meaning "above the ventricle") tachycardias, those that arise in the atria (plural of atrium) or the atrioventricular node, and ventricular tachycardias.

In both instances, an extra or early beat may trigger the rapid rhythms. Although the sinus node develops as the specialized site of impulse production, all cardiac muscle cells retain the capacity to become pacemaker cells.

Normally, the pacemaking activity of the sinus mode suppresses impulse production by other cells, but if conductance to some other part of the heart muscle is blocked, or if the heart is over stimulated, islands of cells may express their latent impulse-production ability, resulting in extra beats. In other words, impulses are fired from one or more locations in addition to the normal pacemaker, the sinus node.

Extra or early beats arising in the atria are called premature atrial contractions (PACs), atrial premature beats, atrial ectopic beats, or atrial extrasystoles. Such extra beats often occur in normal hearts and are usually harmless. They can, however, cause palpitations, as well as trigger supraventricular tachycardias. Many of these episodes are not serious and can easily be treated.
Causes and Risk Factors of Premature Ventricular Contractions
PVC's can occur in healthy, normal hearts. They are also sometimes a sign of underlying cardiac disease such as coronary artery disease, cardiomyopathy (diseased muscle tissue), or other heart problems. PVCs can also be caused by abnormalities in body chemistry, drugs or thyroid disease.

Symptoms of Premature Ventricular Contractions
A person with PVCs may or may not sense the irregular beat, usually as a skipped beat.

Diagnosis of Premature Ventricular Contractions
Continuous electrocardiographic monitoring, especially during exercise, may reveal more frequent and complex PVCs than occur during a single routine electrocardiogram (EKG). This involves wearing a heart monitor for a period of time from several days to a few weeks while performing normal work or home activities. If episodes occur, the monitor records what has happened and can transmit electronically the information to be interpreted.

If there are frequent PVCs, the physician may order tests to rule out thyroid disease (hyperthyroidism), abnormalities in blood chemistries (potassium and magnesium), as well as rule out heart disease.

Treatment of Premature Ventricular Contractions
In general, if the patient is asymptomatic and has no associated cardiac disease, no therapy is indicated. If they are frequent or symptomatic, medication and other treatment will be recommended.

Drug treatment is aimed at suppressing premature ventricular contractions (PVCs) in order to prevent serious ventricular arrhythmias and to reduce the risk of sudden death.

Other developments include electrophysiology studies and treatment programs that combine drug therapy with surgery and antiarrhythmic devices, such as implantable defibrillators.

Another option for treating life-threatening ventricular arrhythmias may be the automatic cardioverter-defibrillator (AICD). Unlike other types of treatment, this does not prevent arrhythmias but instead stops them within seconds.

Questions To Ask Your Doctor About Premature Ventricular Contractions
What tests are used to monitor this condition?

Are there any side effects or complications with these tests?

What type of PVC is it?

Is this case life-threatening?

What are the signs and symptoms that indicate a possible heart attack?

What medication will you be prescribing?

What are the side effects?

What are normal PACs (premature atrial contractions)?

How many PACs become abnormal or dangerous?

What affect might exercise have on the condition?

Alcohol?

Answer 2

Preventricular Contraction

Answer 3

1

Answer 4

The above respondant had it mostly right.

A PVC does not necessarily occur with an electrolyte imbalance. It can have no particular source with a few PVC's. If they are happening very frequently then it may be reasonable to seek additional evaluation.

Here's what happens: The large part of your heart - the ventricle - generates a beat and beats out of turn sending an electrical impulse backward from the bottom of the heart to the top. Normal is top to bottom.

The top of the heart requires a moment to reset (this is when you heart "stopped") and then resumes the normal cycle of top-bottom, top-bottom, etc. During that pause your ventricle is filling with blood longer than normal. Therefore when the ventricle beats again, its going to be a really vigorous beat. At no time does the ventricle push blood back into the atria (unless you also have a valvular disorder)

Some people notice this abnormal beat very much. Others do not notice it at all.

If you have an occassional PVC, there is no treatment or further evaluation necessary.

Good luck.

Answer 5

It's called a premature ventricular contraction, or PVC, and it happens a lot when there is a fluid electrolyte imbalance in your body. What happens is the ventricle will contract before it is supposed to and push the remaining blood that is in that ventricle to the atria. Your heart is controlled by electrical impulses(that's what an ECG measures, electrical impulses), and when part of your electrical system in the heart "fires" before it is supposed to, you get what's called a PVC.

Answer 6

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