palpitation can be described as any increase awareness of your own heartbeat. it may be faster, slower, regular or irregular heartbeats. murmurs are abnormal heart sounds that usually need a stethoscope to be detected. they usually mean an abnormal flow of blood in the chambers of the heart across the valves.
what you're describing sounds like drop beat or escape beat. it may be a form of ventricular ectopic beats. usually, the electric current of the heart starts at the atrium, spreads throughout the entire atrium in a coordinated pattern, crosses the AV node, and spreads over the entire ventricle in a fixed pattern. this causes the blood to be pumped from atrium into the ventricle and out of the heart in a fixed rhythm.
however if there is any delay in the conduction of the electric impulse from atrium to ventricle, blood starts to pool in the ventricle, a little more than usual because of the delayed ejection. a random point in the ventricle then fires off an impulse all by itself and spreads throughout the ventricle. this represents the delayed beat, which may be felt more forcefully than a regular beat because of the increased volume of blood that was waiting to be ejected.
everything then calms down and the atrium takes over again on the next beat and everything goes back to normal.
the things to be careful about are...
1. you should do an EKG to be sure of the diagnosis. make sure there is no other cardiac pathology
2. you need to know how often this irregular beat happens, whether its random and rare, or regularly every few beats. 5:1 is less dangerous than 2:1.
3. you need to know whether its always the same part of the ventricle that takes over the beat, or different parts take over each time. always the same spot is safer than having various spots.
4. also check your electrolytes to make sure there are no abnormalities that may affect the conduction of impulses across the heart muscles.
btw, i learn all this from Bonaparte
