Summary: | 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.
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