Перевод и анализ слов искусственным интеллектом ChatGPT
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- этимология
Что (кто) такое pulseless$65457$ - определение
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![sinus]] top, ventricular tachycardia bottom](https://commons.wikimedia.org/wiki/Special:FilePath/Ventricular Tachycardia.png?width=200 "sinus]] top, ventricular tachycardia bottom")
![Blood flow pulse wave in the central retinal artery (red) and vein (blue), measured in the eye fundus of a patient with Takayasu arteritis by [[laser Doppler imaging]].](https://commons.wikimedia.org/wiki/Special:FilePath/Takayasu LDH.jpg?width=200 "Blood flow pulse wave in the central retinal artery (red) and vein (blue), measured in the eye fundus of a patient with Takayasu arteritis by [[laser Doppler imaging]].")
![gadolinium MRI]] in a patient with Takayasu arteritis showing thickened, enhancing aortic wall, consistent with large vessel vasculitis](https://commons.wikimedia.org/wiki/Special:FilePath/Takayasu arteritis.JPG?width=200 "gadolinium MRI]] in a patient with Takayasu arteritis showing thickened, enhancing aortic wall, consistent with large vessel vasculitis")
![Pulseless electrical activity, it is possible to observe by invasive blood pressure (red) the transition from a normal mechanical activity of the heart, which progressively changes in rhythm and contractile quality to [[asystole]], even in the presence of normal electrical activity (green), also confirmed by the pulse oximeter detection even if with artifacts (blue)](https://commons.wikimedia.org/wiki/Special:FilePath/Dissociazione elettromeccanica (PEA).svg?width=200 "Pulseless electrical activity, it is possible to observe by invasive blood pressure (red) the transition from a normal mechanical activity of the heart, which progressively changes in rhythm and contractile quality to [[asystole]], even in the presence of normal electrical activity (green), also confirmed by the pulse oximeter detection even if with artifacts (blue)")
Википедия
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Ventricular tachycardia (V-tach or VT) is a fast heart rate arising from the lower chambers of the heart. Although a few seconds of VT may not result in permanent problems, longer periods are dangerous; and multiple episodes over a short period of time are referred to as an electrical storm. Short periods may occur without symptoms, or present with lightheadedness, palpitations, or chest pain. Ventricular tachycardia may result in ventricular fibrillation (VF) and turn into cardiac arrest. This conversion of the VT into VF is called the degeneration of the VT. It is found initially in about 7% of people in cardiac arrest.
Ventricular tachycardia can occur due to coronary heart disease, aortic stenosis, cardiomyopathy, electrolyte problems, or a heart attack. Diagnosis is by an electrocardiogram (ECG) showing a rate of greater than 120 beats per minute and at least three wide QRS complexes in a row. It is classified as non-sustained versus sustained based on whether it lasts less than or more than 30 seconds. The term ventricular arrhythmia refers to the group of abnormal cardiac rhythms originating from the ventricle, which includes ventricular tachycardia, ventricular fibrillation, and torsades de pointes.
In those who have normal blood pressure and strong pulse, the antiarrhythmic medication procainamide may be used. Otherwise, immediate cardioversion is recommended, preferably with a biphasic DC shock of 200 joules. In those in cardiac arrest due to ventricular tachycardia, cardiopulmonary resuscitation (CPR) and defibrillation is recommended. Biphasic defibrillation may be better than monophasic. While waiting for a defibrillator, a precordial thump may be attempted (However reserved to those who have the prior experience of doing so) in those on a heart monitor who are seen going into an unstable ventricular tachycardia. In those with cardiac arrest due to ventricular tachycardia, survival is about 45%. An implantable cardiac defibrillator or medications such as calcium channel blockers or amiodarone may be used to prevent recurrence.
