Evaluation and Management of Syncope: Comparing the Guidelines of the American College of Cardiology/American Heart Association/Heart Rhythm Society and the European Society of Cardiology

Williford, Noah N.; Ward, Chad; Olshansky, Brian

doi:10.19102/icrm.2018.091208

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…Blood pressure was measured continuously and noninvasively using the Finapres Model 1 (Finapres Medical System B.V., the Netherlands). Diagnostic criteria 3,11,12 Typical OH was de ned as a sustained reduction of either systolic blood pressure of at least 20 mmHg or diastolic blood pressure of 10 mmHg within 3 minutes of head-up tilt to at least 70° on a tilt table. Initial OH was de ned as a transient blood pressure decrease (> 40 mmHg systolic blood pressure and/or > 20 mmHg diastolic blood pressure) within 15 seconds of standing.…”

Section: Tilt-test Protocol and Measurementsmentioning

confidence: 99%

Haemodynamic Characteristics And Factors Influencing The Head-Up Tilt Test In Patients With Orthostatic Hypotension

Wang¹,

Yueyang²,

Wang³

et al. 2021

Preprint

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Background: Failure to activate autonomic neural and hormonal reflex mechanisms could result in orthostatic hypotension. Patients with orthostatic hypotension often experience symptoms of cerebral hypoperfusion, including syncope. The purpose of this study was to investigate the haemodynamic characteristics of patients with orthostatic hypotension and the factors affecting blood pressure regulation.Methods: This retrospective study enrolled 45 patients who were diagnosed with typical orthostatic hypotension by the head-up tilt test at Beijing Tiantan Hospital, Capital Medical University from June 2019 to December 2020. Changes in haemodynamic parameters in these patients were compared in the supine and tilted upright positions.Results: For all patients, haemodynamic parameters in the supine and tilted upright positions were compared, and systolic blood pressure, diastolic blood pressure, mean blood pressure, cardiac output and stroke volume were all significantly decreased per minute. Heart rate significantly increased per minute, but systemic vascular resistance did not significantly change. The absolute value, percentage and rate of increases in heart rate and the absolute value, percentage and rate of decreases in stroke volume from the supine to the titled upright position were significantly lower in patients 60 years and older than in patients under 60 years old. Linear regression analyses found that the changes in heart rate, stroke volume and systemic vascular resistance were related to changes in systolic blood pressure, while the changes in stroke volume and systemic vascular resistance had more important effects on systolic blood pressure.Conclusions: In patients with orthostatic hypotension, we observed no significant increase in systemic vascular resistance from the supine position to the tilted upright position. Nevertheless, an increase in systemic vascular resistance had a significant impact on the maintenance of systolic blood pressure. In addition, in orthostatic hypotension patients younger than 60 years of age, heart rate increased while stroke volume decreased significantly after tilting upright compared with orthostatic hypotension patients older than 60 years of age and older.

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Section: Tilt-test Protocol and Measurementsmentioning

confidence: 99%