The role of vagal tests in the relief of atrioventricular tachycardia attacks in differenat gender groups

Abstract

Background. Vagal tests are the simplest and safest method of relieving tachycardia attacks. Assessment of the cupping ability and undesirable manifestations of n. Vagus in attacks of reciprocal atrioventricular orthodromic tachycardia and paroxysms of reciprocal atrioventricular nodal tachycardia allows choosing the safest way to stop tachycardia in patients of different gender groups. The purpose of the study is to assess the cupping ability and safety of vagal methods, such as the Valsalva test, stimulation of the carotid zone by Cermak and Goering, as well as their complex application in cases of attacks of orthodromic AV tachycardia and attacks of nodal AV tachycardia in a comparison of pregnant/ non-pregnant women with men. Materials and methods. The main object of the analysis is women at various gestation periods: 30 – from the attacks of reciprocal atrioventricular orthodromic tachycardia, 34 – from the paroxysms of reciprocal atrioventricular nodal tachycardia, without somatic pathology. As a control group, non-pregnant women and men without signs of coronary artery disease and thyroid pathology were selected: non-pregnant women, 32 of them from the attacks of reciprocal atrioventricular orthodromic tachycardia, 36 from the paroxysms of reciprocal atrioventricular nodal tachycardia, and two groups of men: 1st group of 20 men from the attacks of reciprocal atrioventricular orthodromic tachycardia, 2nd group – 36 men from the paroxysms of reciprocal atrioventricular nodal tachycardia. In each group, provocation by electrophysiological stimulation was performed to initiate attacks of nodular and orthodromic tachycardia, and subsequent relief of seizures by vagal tests. Results. The cupping ability of the Valsalva sample is higher than that of the stimulation of the carotid zone, while the side effects are on the contrary lower. The effectiveness of any vagal tests decreases from the first trimester to the third and depends on the discreteness of AV conduction (the cupping ability in case of vagus nerve irritation is equally effective in orthodromic and nodular tachycardia with continuous type of AV conduction and significantly decreases with intermittent). In the control groups, there was no significant gender dependence of the effectiveness of vagal samples. Conclusions. There is no gender dependence in the effectiveness of vagal tests. The cupping ability of n. Vagus stimulation methods decreases from the first trimester to the third and depends on the discreteness of atrioventricular conduction.

Keywords

• vagal tests
• valsalva test
• stimulation of the carotid zone
• attacks of orthodromic and nodular av tachycardia