What is a pacemaker

summary

What is a pacemaker? An old man I met used it to treat heart disease. I was curious about what it came from, so I found a lot of materials on the Internet. Let's share with you what a pacemaker is.

What is a pacemaker

First of all, cardiac pacemaker is a kind of medical electronic instrument. It can stimulate the heart, excite and contract it by sending out a certain form of electric pulse, that is, simulate the formation and conduction of normal heart impulse, so as to treat the cardiac dysfunction caused by some arrhythmias.

Secondly, the electrodes were placed in the atrium. The pacemaker sends out pulses to the atrium according to the prescribed perimeter or frequency, and sends down to activate the ventricle, so as to maintain the sequential contraction of atrium and ventricle. If the pacemaker has its own atrial beat, it can sense its own P wave, inhibit the response, and restructure the pulse firing cycle to avoid atrial rhythm competition.

Finally, after implanting pacemaker, a set of most suitable working mode and parameters can be specified according to the specific conditions of the body, so that the pacemaker can give full play to the best efficiency, save money and maintain the longest service life. In some cases, some faults can be eliminated non invasively. With the expansion of program-controlled function, the pacemaker can store data, monitor heart rate and perform electrophysiology Check the function of the system.

matters needing attention

What is the pacemaker? It is not suitable for application: ① the blood pressure drops more than 20mmhg during VVI pacing; ② the cardiac function is not well compensated; ③ pacemaker syndrome is known, which is related to the decrease of cardiac output caused by VVI pacing interfering with atrioventricular sequential contraction and atrioventricular retrograde conduction.