Therefore, the primary indication for pacemakers is symptomatic bradycardia and conduction block (i.e. bradyarrhythmia). With the further development of pacemakers, there are now new pacemakers (also called cardioverter-defibrillators), called ICDs, which not only perform the functions of the original pacemaker, but also respond to tachyarrhythmias and lethal ventricular fibrillation and ventricular flutter, and thus prevent sudden death.
Question 2: Why can't the electrodes be placed in front of and behind the heart at the same time You can understand a circuit, connecting leads is to connect the cardiac electrical activity to the circuit, the waveform is the detection of the current, of course, the middle is processed, involving the doctrine of secondary projection, first of all, a three-dimensional stereoscopic concept of the heart mounted in a square, the center of the heart is the heart of the center of the cardiac de-pole, the repolarization of the heart vector ring is analogous to that of a square.
Question 3: The electrode pads for ECG monitoring have *** placement? Standard 3-lead electrode placement: white (right arm) electrode placed in the subclavian, against the right shoulder black (left arm) electrode placed in the subclavian, against the left shoulder red (left abdominal) electrode placed in the left lower abdomen, the lower edge of the arch of the ribs of the five electrodes are placed: right on the right edge of the sternum clavicular line between the first intercostal right below the right clavicle line at the level of the intermediate clavicular line Jianchu Intermediate - the left edge of the sternum between the fourth intercostal left on the left sternal left edge of the clavicle between the first intercostal Left left under the clavicular line - the middle left clavicular line Jianchu Left upper - first intercostal space in the midclavicular line on the left edge of the sternum Left lower - at the level of the raphe in the midclavicular line on the left side of the sternum 3-lead is an analog 2-lead, which belongs to the integrated monitoring lead and has no diagnostic significance for ECG localization, and is only suitable for monitoring heart rate and arrhythmia. 5-lead can be used to monitor the heart rate and rhythm. In addition to monitoring the heart rate and rhythm, it can obtain the ECG of 6 leads of the limb, and selectively monitor the chest lead, which can be used to locate and diagnose cardiac lesions, and can also be used for further analysis of arrhythmia.
Question 4: What is the impedance and voltage of the electrodes of the pacemaker? 300-1500 impedance
There is no normal value of the voltage as long as it is able to *** the heart. As long as it is able to *** the heart to beat, it is OK, generally less than 2 will be better
Question 5: What is the natural pacemaker in the body? A pacemaker is a kind of electronic therapeutic device implanted in the body. Since the first pacemaker was implanted into the human body in 1958, pacemaker manufacturing technology and techniques have developed rapidly, and their functions have become increasingly sophisticated. While the application of pacemakers has successfully treated bradyarrhythmias and saved the lives of thousands of patients, pacemakers have also begun to be applied to tachyarrhythmias and non-cardiac diseases, such as the prevention of paroxysmal atrial tachyarrhythmias, carotid sinus syncope, and biventricular synchronization for the treatment of drug-refractory congestive heart failure.
The pulse generator delivers pulsed currents of a certain frequency at regular intervals, which are transmitted through wires and electrodes to the myocardium (atria or ventricles) that the electrodes are in contact with, so that the local myocardial cells are excited by the external electrical *** and conduct to the surrounding myocardium through the intercellular gap connections or intercalated disk connections, resulting in excitation of the entire atrium or ventricle and consequently contractile activity. It should be emphasized that the myocardium must have excitation, conduction, and contraction for cardiac pacing to be effective