Can We Differentiate Neurocardiogenic Syncope Types By Using Heart Recovery Indices Before Performing Head-up Tilt Testing
Journal Title: Journal of Clinical Cardiology and Cardiac Therapy - Year 2016, Vol 1, Issue 1
Abstract
Syncope is commonly seen clinical finding which accounts for %6 of hospital admission and %3 of emergency departments [1] . Neurocardiogenic syncope is the most common cause of syncope [2]. The uncontrolled response of autonomic nervous system has been implicated in neurocardiogenic syncope. Increased parasympathetic response to an increased sympathetic activity in neurocardiogenic syncope causes an imbalance in the autonomic nervous system, and they, therefore, seem to play a role in the pathophysiology of neurocardiogenic syncope [3,4] . As a result of exaggerated parasympathetic response, patients may experienced syncope due to vasodilatation related hypotension or due to excessive bradycardia. The mixed form of vasodilatation and bradycardia can be seen in the other syncope groups. However, we cannot differentiate neurocardiogenic forms without performing head-up tilt testing (HUTT) [5]. After exercise stress testing, Heart Rate Recovery (HRR) is one of the commonly used parameters that reflects autonomic activity. HRR indices show the rate of decline in the heart rate (HR) after termination of an exercise test and are defined as the HR difference between the maximal HR during exercise stress testing and the HR during the recovery phase. Heart rate recovery after the first minute of exercise is mainly controlled by the parasympathetic nervous system [6]. We aim to investigate HRR as indices of parasympathetic tonus for differentiation of neurocardiogenic syncope types.
Authors and Affiliations
Sadık Volkan Emren
Keywords
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- EP ID EP249304
- DOI 10.28967/jccct.2016.01.16002
- Views 105
- Downloads 0
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