JOURNAL ARTICLE
PRAGMATIC CLINICAL TRIAL
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Cardiovascular exercise as a treatment of postural orthostatic tachycardia syndrome: A pragmatic treatment trial.

BACKGROUND: Postural orthostatic tachycardia syndrome (POTS) is a heterogeneous disorder of orthostatic intolerance with few proven treatments.

OBJECTIVE: The purpose of this study was to determine the efficacy of an unsupervised at-home training regimen for the treatment of POTS.

METHODS: We reviewed the medical records including autonomic function testing, symptom scores, and activities of daily living in individuals with POTS who were invited to participate in a 6-month outpatient cardiovascular exercise program.

RESULTS: Seventy-seven individuals were invited (invited group), 48 of 77 (62%) participated (treated group) and 43 of 77 (56%) of those completed. Twenty-nine of 77 (38%) did not participate (control group). After 6 months, 11 of 48 (23%) individuals in the treated group met heart rate criteria for POTS compared with 27 of 29 (93%) in the control group (χ2 test, P < .0001). Supine heart rate (68 ± 8 beats/min vs 77 ± 10 beats/min; P < .001) and standing heart rate (95 ± 11 beats/min vs 115 ± 10 beats/min; P < .001) decreased in the treated group compared with the control group. The frequency of syncope decreased in the treated group (P < .001). An improvement in the EuroQol perceived quality of life scale score was detected in the treated group (61 ± 15 vs 71 ± 12 after 6 months, P < .001) compared with the control group (64 ± 9 vs 66 ± 8 after 6 months; P = .52).

CONCLUSION: In this study, we report a successful pragmatic clinical trial of an outpatient exercise protocol in a tertiary care referral population that significantly improved cardiovascular function and quality of life in patients with POTS.

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