Motnje srčnega ritma pri testu z nagibno mizo in nitroglicerinom
Rotar, Melita
Introduction. Syncope is defined as a transient loss of consiousness and postural tone caused by sudden decrease of cerebral blood flow. The most frequent form is neurocardiogenic or vasovagal ...syncope, characterized by hypotension and bradycardia. In the past there have been a lot of difficultiesdiagnosing this form of transitient loss of consiousness. Until recently most of the neurocardiogenic syncope were classified as syncope of unknown origin, but with the use of head-up tilt table test (HUT) 50-60% of these syncope were proven to be neurocardiogenic in origin. HUT is a safe noninvasive test, which can be potentiated with sublingual nitroglycerine to obtain a larger positivity rate. With higher number of positive test results we also expect a larger number of arrhythmias in the form of extrasystole or even asystolia, but the question remainsČ is nitroglycerine provoked HUT potentionally more harmful for the patient. Patients and methods. We compared a group of 565 patients (group A) who were tested with passive HUT to a group of 546 patients by whom HUT was potentiated with sublingual nitroglycerine. Weused a HUT protocol, which was previously described by Fitzpatrick et al. First 10 minutes of supine position were followed by 45 minutes of passive tilt at 60*. Patients in group B were given 0,5 mg of nitroglycerine (Angised`) sublingually in the 30. minute of test. During the test we recordeda onechannel ECG with surface electrodes, and with mercury sfingomanometer blood pressure. On the ECG record we analysed arrhythmias thatoccurred during the test and subgrouped these arrhythmias acording to the time in which they appearedČ predominantly before the administration of nitroglycerine, predominantly after the administration of the drug or indifferently through the whole test. We defined the specifity and sensitivityof HUT for both groups. Results were compared using the chi2test and Student t-test. (Abstract truncated at 2000 characters).
Vrsta gradiva - raziskovalna naloga
; neleposlovje za odrasle
Založništvo in izdelava - Ljubljana : [M. T. Kermavnar], 2000
GS II 0000708463 glavno skladišče
GS II 708463 glavno skladišče
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