What are the advantages and disadvantages of double chamber and single chamber in artificial cardiac

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Single-chamber and dual-chamber are mainly single- and two-point pacing for the pacemaker.

Single-chamber has intraatrial pacing and intraventricular pacing, (1) atrial on-demand (AAI) type: electrodes are placed in the atrium. The pacemaker emits pulses to pac the atria at a specified circumference or frequency and transmits them down to the ventricles to maintain the sequential contractions of the atria and ventricles.

If there is its own atrial beat, the pacemaker can sense its own P wave, inhibit the response, and readjust the pulse release cycle to avoid atrial rhythm competition.

2) Ventricular on-demand (VVI) type: electrodes are placed in the ventricles. If there is a heart rate of its own, the pacemaker can sense the QRS wave of its own heartbeat, inhibit the response, and readjust the pulse release cycle to avoid heart rhythm competition.

However, this type of pacemaker only ensures the rhythm of ventricular pacing, and cannot maintain the synchronization, sequence, and coordination of atrial and ventricular contractions, so it is non-physiological.

The double chamber is where electrodes are placed in both the atria and ventricles. If your heart rate is slower than the pacemaker's low-limit frequency, causing ventricular conduction dysfunction, the pacemaker senses the P wave and triggers ventricular pacing (which works in a VDD manner). If the atrium (P) is too slow in its own frequency, but the atrioventricular conduction function is good, the pacemaker paces the atria and travels down to the ventricles (AAI works).

The logic of this dual-chamber pacemaker always keeps the atria and ventricles in synchronized, sequential, and coordinated contractions. If only VDD is required, a single-lead VDD pacemaker can be used, which is much more convenient than placing two wires in the atria and ventricles.

A single-chamber pacemaker has only one electrode lead, which can be implanted into the right atrium or right ventricle at a suitable site as needed. Generally, a single-chamber pacemaker can be installed in the following situations: The heart beats too slowly because of a problem with the sinus node, and the atrioventricular conduction is good, at this time, a single-chamber pacemaker can be implanted in the atrium.

Atrial fibrillation with a slow heartbeat from the atrioventricular block surface may allow a ventricular single-chamber pacemaker to be implanted. Pacemakers are used only to prevent occasional but very severe heartbeats that are too slow, and can be implanted with a single-chamber pacemaker in the atrium or ventricle, or a dual-chamber pacemaker.

A dual-chamber pacemaker has two electrode leads, which are usually implanted in the right atrium and the right ventricle. In general, the results produced by dual-chamber pacemakers are more in line with human needs and are particularly suitable for patients with atrioventricular block. In patients with pre-existing cardiac insufficiency, a dual-chamber pacemaker should be recommended as the first choice.

In addition, unless atrial fibrillation is comorbid, a dual-chamber pacemaker can be installed in other cases where a single-chamber pacemaker can be installed. Recommended Article:

Dual-chamber pacemaker: There are two electrodes, one in the right atrium and one in the right ventricle. The dual-chamber pacemaker is more in line with the physiological pacing sequence, better pumping blood, and maintaining good hemodynamics.

There are various modes of dual-chamber pacing, including atrioventricular sequential pacing (DDI), atrioventricular sequential ventricular on-demand pacing (DVI), atrioventricular dual-chamber sequential pacing (DDD), dual-chamber asynchronous asynchronous pacing (DOO), atrial synchronous ventricular inhibition pacing (VDD), atrial perceived ventricular pacing (VAT), etc.

Dual-chamber pacemakers generally choose DDD mode (D stands for Dual-Chamber, Dual-chamber Sensing, Dual-Chamber Pacing, Bidirectional Regulation: Inhibition or Trigger). Although dual-chamber pacing is more physiologically demanding, not everyone is suitable for a dual-chamber pacemaker, and patients with permanent atrial fibrillation are not suitable.

The main purpose of the three chambers is to increase cardiac synchronization and improve heart failure, and there should be a good improvement in symptoms. Ordinary double chambers are mainly when there is a fatal bradyarrhythmia, and the pacemaker can drive the heart. A pacemaker with defibrillation can eliminate fatal tachyarrhythmias such as ventricular fibrillation and ventricular tachycardia.

From the perspective of your needs, you should need a three-chamber pacemaker, which is mainly used to correct heart failure. Just ask the doctor, the brand is different** different. However, as long as the same brand of medical insurance is entered, it should be the same across the country.

That's right. The double chamber is more complex, the right atrium and right ventricle, in order, are very close to normal, so that the atrium and ventricles start in the order of steps, it can be said that it is a universal pacemaker, which can basically be applied. If according to the principle of physiological pacing as much as possible, it is generally recommended to install a dual-chamber pacemaker, such as the sick sinus and the third degree.

If it is a patient with frequent or persistent atrial fibrillation, the sinus rhythm has been broken, and even if a dual-chamber pacemaker is installed, physiological pacing cannot be restored, and only a simple ventricular pacing can be done, which has the same effect as installing a single-chamber pacemaker. Therefore, if it is atrial fibrillation, the doctor will generally recommend the installation of a single chamber based on the patient's economic situation.