Impairments in Blood Pressure Regulation and Cardiac Baroreceptor Sensitivity Among Patients With Heart Failure Supported With Continuous-Flow Left Ventricular Assist Devices
| Autor: | Justin S. Lawley, Hannah Edelmann, Greg Coe, Pedro Giro, Margaret Schulte, Jay D. Pal, Mark Beindorff, Eugene E. Wolfel, Robert L. Page, William K. Cornwell, Melanie J. Spotts, Amrut V. Ambardekar, Cullen Buchanan, Ashley Pratt-Cordova, Christine M. Swanson, Takashi Tarumi, Wendy M. Kohrt, Christine Sailer, Matthew C. Babcock |
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| Rok vydání: | 2021 |
| Předmět: |
medicine.medical_specialty
Supine position Ejection fraction Baroreceptor business.industry medicine.medical_treatment Hemodynamics 030204 cardiovascular system & hematology medicine.disease 03 medical and health sciences 0302 clinical medicine Blood pressure Heart failure Internal medicine Heart rate medicine Valsalva maneuver Cardiology 030212 general & internal medicine Cardiology and Cardiovascular Medicine business |
| Zdroj: | Circulation: Heart Failure. 14 |
| ISSN: | 1941-3297 1941-3289 |
| DOI: | 10.1161/circheartfailure.120.007448 |
| Popis: | Background: Continuous-flow (CF) left ventricular assist devices (LVADs) improve outcomes for patients with advanced heart failure (HF). However, the lack of a physiological pulse predisposes to side-effects including uncontrolled blood pressure (BP), and there are little data regarding the impact of CF-LVADs on BP regulation. Methods: Twelve patients (10 males, 60±11 years) with advanced heart failure completed hemodynamic assessment 2.7±4.1 months before, and 4.3±1.3 months following CF-LVAD implantation. Heart rate and systolic BP via arterial catheterization were monitored during Valsalva maneuver, spontaneous breathing, and a 0.05 Hz repetitive squat-stand maneuver to characterize cardiac baroreceptor sensitivity. Plasma norepinephrine levels were assessed during head-up tilt at supine, 30 o and 60 o . Heart rate and BP were monitored during cardiopulmonary exercise testing. Results: Cardiac baroreceptor sensitivity, determined by Valsalva as well as Fourier transformation and transfer function gain of Heart rate and systolic BP during spontaneous breathing and squat-stand maneuver, was impaired before and following LVAD implantation. Norepinephrine levels were markedly elevated pre-LVAD and improved—but remained elevated post-LVAD (supine norepinephrine pre-LVAD versus post-LVAD: 654±437 versus 323±164 pg/mL). BP increased during cardiopulmonary exercise testing post-LVAD, but the magnitude of change was modest and comparable to the changes observed during the pre-LVAD cardiopulmonary exercise testing. Conclusions: Among patients with advanced heart failure with reduced ejection fraction, CF-LVAD implantation is associated with modest improvements in autonomic tone, but persistent reductions in cardiac baroreceptor sensitivity. Exercise-induced increases in BP are blunted. These findings shed new light on mechanisms for adverse events such as stroke, and persistent reductions in functional capacity, among patients supported by CF-LVADs. Registration: URL: https://www.clinicaltrials.gov ; Unique identifier: NCT03078972. |
| Databáze: | OpenAIRE |
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