Abstract
Background and purpose:Syncope is caused by disorder in blood flow to the brain and usually occurs in autonomic system dysfunction. On the other side, heart rate and systolic blood pressure response during cardiac exercise test as well as recovery stage depend upon autonomic nervous system. This research compares heart rate recovery (HRR) and systolic blood pressure recovery (SBPR) following exercise test among patients with vasovagal syncope and normal individuals.Research methodology:In this cross-sectional descriptive study, 31 patients with vasovagal syncope confirmed by head up tilt test (HUTT) and 32 normal individuals were investigated within 2015- 2017. Systolic and diastolic blood pressures, as well as heart rate were measured for both groups in the first and third minutes post exercise test; and any changes in blood pressure and heart rate were compared.Findings:48.39% and 51.61% of the patients group were female and male, respectively; and 59.37% and 40.63% of control group consisted of female and male. Mean age range in experimental group was 39.31 and 34.45 for control group. Mean HRR and mean SBPR for minute one was higher in patient group than control group (P value=0.1) and P value=0.12) respectively; while, mean HRR and SBPR for minute three showed larger in control group than the patients (P value=0.31 and 0.1) respectively.Conclusion:Patients suffering from vasovagal syncope showed different recovery test response than control group due to autonomic system dysfunction.
Highlights
Syncope is a loss of consciousness caused by disorder in blood flow to brain for a short period and spontaneously recovers
Since vasovagal syncope lacks any definitive treatment, further studies may shed a new light on findings of etiology and treatment. In this cross-sectional descriptive study, patients suffering from vasovagal syncope confirmed by head up tilt test visited at Farshchian Heart Center, within 2015-2016, and normal individuals were analyzed and both groups compared in term of blood pressure and heart rate post-cardiac exercise test alterations
Post-cardiac exercise test HRR and SBPR data for the first and third minutes were collected in patients and normal individuals; data were analyzed through SPSS 16
Summary
Syncope is a loss of consciousness caused by disorder in blood flow to brain for a short period and spontaneously recovers It is characterized with fast onset, short duration, and spontaneous recover [1, 2]. Syncope is a critical clinical issue as it is common, costly, and often disabling, which may even causes loss and hurt. It may be the first warning sign prior sudden cardiac death [2]. This research compares heart rate recovery (HRR) and systolic blood pressure recovery (SBPR) following exercise test among patients with vasovagal syncope and normal individuals. Conclusion: Patients suffering from vasovagal syncope showed different recovery test response than control group due to autonomic system dysfunction
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