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Tytuł oryginału:
Heart rate variability during head-up tilt test in patients with syncope of unknown origin.
Tytuł polski:
Omdlenia niewyjaśnionego pochodzenia. Zmienność rytmu serca podczas testu pochyleniowego.
Autorzy:
Gielerak
Grzegorz,
Makowski
Karol,
Kramarz
Elżbieta,
Cholewa
Marian,
Dłużniewska
Ewa,
Roszczyk
Anna,
Bogaj
Agnieszka
Źródło:
Kardiol. Pol. 2002: 57 (11) s.399-406, il., tab., bibliogr. 15 poz. - Tekst równol. w jęz. pol.
Sygnatura GBL:
313,397
Hasła klasyfikacyjne GBL:
kardiologia
neurologia
Typ dokumentu:
praca kliniczna
Wskaźnik treści:
ludzie
dzieci 13-18 r.ż.
dorośli 19-44 r.ż.
dorośli 45-64 r.ż.
dorośli = 65 r.ż.
płeć męska
płeć żeńska
Streszczenie angielskie:
Background. Analysis of pathophysiological mechanisms responsible for vaso-vagal reaction reveals a close relationship between neurocardiogenic syncope and the preceding abnormalities of autonomic nervous system (ANS). Therefore, the interest in the assessment of heart rate variability (HRV) for detectin and establishing therapy in patients with syncope due to vaso-vagal mechanism is not surprising. Aim. To assess ANS changes during tilt testing in pateitns with syncope of unknown origin. Methods. Forty patients (18 males, mean age 34.8 ń 15.8 years) with a history of at least two syncopal episodes during the last 6 months and 24 healthy contorls underwent tilt testing. Spectral HRV analysis was performed from ECG recorded 5 min before tilting (period A), 5 min after tilting (period B), and 5 min before syncope (or 20-25 min of tilt test when syncope did not occur) (period C). Results. Tilt test was positive in 23 (58 p.c.) patients; 12 (30 p.c.) had mixed response, 10 (25 p.c.) - vasodepressive, and 1 (3 p.c.) - cardioinhibitory reaction. The mean time from tilt to syncope was 22.3 minutes. One (4 p.c.) control subject developed syncope. In all groups a decrease of LF and HF power, as well as an increase in the LF/HF ratio in response to tilting were observed. The LF/HF values were significantly different between patients with mixed vaso-vagal reaction and controls (1.9 vs 4.2; p = 0.04). In the C-B periods the highest decrease in the HF spectra was found in patietns with mixed reaction and was significantly greater than in other patients or controls...
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