Ventricular electrical and ventricular pressure dual sensing system and method for implantable cardiac pacemakers

Abstract

The invention discloses a ventricular electrical and ventricular pressure dual sensing system and method for implantable cardiac pacemakers. The system includes a magnetic field signal processing unitwhich converts artificial or natural magnetic field intensity into logical signals and inputs the logical signals to a central processing unit, a ventricular electrical sensing circuit which senses and processes ventricular electrical signals and transmits the ventricular electrical signals to the central processing unit, a ventricular pressure sensing circuit which senses and processes ventricular pressure signals and transmits the ventricular pressure signals to the central processing unit, and the central processing unit which is responsible for switching a sensing pacing mode program andinteracting with a pacemaker microprocessor. In an artificial or natural high electromagnetic field interference scenario, the magnetic field signal processing unit of the system can automatically sense the change of magnetic field and switch the pacing mode from a ventricular electrical sensing-ventricular pacing mode to a ventricular pressure sensing-ventricular pacing mode to maintain the effective perception of cardiac motion and on-demand pacing through ventricular pressure signals and ensure the stability of cardiac hemodynamics, so as to greatly improve the safety of surgery.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a ventricular electric-ventricular pressure dual sensing system and method for an implantable cardiac pacemaker. Background technique [0002] An implantable cardiac pacemaker (cardiac pacemaker) is an electronic therapeutic device implanted in the human body. The pacemaker senses the electrical activity of the human heart itself through the implanted electrode wires and evaluates the heart's own working conditions. When an abnormality is found, the pacemaker activates the pulse generator to generate low-energy electrical pulses to stimulate the heart to excite and conduct functions to simulate the heart. Electrophysiological functions such as impulse generation and conduction, and the purpose of treating cardiac dysfunction caused by certain arrhythmias. [0003] With the continuous development and improvement of cardiac pacing technology, more and more pati...

AI Technical Summary

Problems solved by technology

[0005] Although the above method can avoid the interference of high-frequency electric knife on pacing perception and the inhibition of pacing pulse, it takes several hours from the beginning of surgical anesthesia, the whole surgical operation until the pacemaker mode is restored to the preoperative working mode again. Among them, the pacemaker paces the patient's heart according to the preset fixed-frequency ventricular pacing mode, and cannot sense its own ventricular electrical signals, which may lead to competing heart rhythms, induce arrhythmias, cause irreversible damage to the heart, and affect blood flow Dynamics, severe cases can endanger the life of the patient

[0006] At the same time, when the patient is in a strong magnetic field environment, the electrical effect caused by the magnetic field will seriously interfere with the pacemaker's perception of the patient's ventricular electrical signal; and because of the existence of the magnetic field, the pacemaker used to switch the ventricular electrical signal The reed switch may not be opened or closed normally, resulting in the pacemaker not being able to sense the ventricular electrical signal and sending pulses normally, which may also cause the patient's malignant arrhythmia or cardiac arrest, endangering the patient's life

Images