Blood pressure responses to handgrip exercise but not apnea or mental stress are enhanced in women with a recent history of preeclampsia

Am J Physiol Heart Circ Physiol. 2024 May 3. doi: 10.1152/ajpheart.00020.2024. Online ahead of print.ABSTRACTPreeclampsia is a risk factor for future cardiovascular diseases. However, the mechanisms underlying this association remain unclear, limiting effective prevention strategies. Blood pressure responses to acute stimuli may reveal cardiovascular dysfunction not apparent at rest, identifying individuals at elevated cardiovascular risk. Therefore, we compared blood pressure responsiveness to acute stimuli between previously preeclamptic (PPE) women (34±5yr, 13±6 months postpartum) and women following healthy pregnancies (CTRL; 29±3yr, 15±4 months postpartum). Blood pressure (finger photoplethysmography calibrated to manual sphygmomanometry-derived values; PPE: n=12, CTRL: n=12) was assessed during end-expiratory apnea, mental stress, and isometric handgrip exercise protocols. Integrated muscle sympathetic nerve activity (MSNA) was assessed in a subset of participants (peroneal nerve microneurography; PPE: n=6, CTRL: n=8). Across all protocols, systolic blood pressure (SBP) was higher in PPE than CTRL (main effects of group all P<0.05). Peak changes in SBP were stressor-specific: peak increases in SBP were not different between PPE and CTRL during apnea (+8±6 vs. +6±5mmHg, P=0.32) or mental stress (+9±5 vs. +4±7mmHg, P=0.06). However, peak exercise-induced increases in SBP were greater in PPE than CTRL (+11±5 vs. +7±7mmHg, P=0.04). MSNA was higher in PPE than C...
Source: American Journal of Physiology. Heart and Circulatory Physiology - Category: Physiology Authors: Source Type: research