Cardiovascular Response to an Inhaled β‐Agonist in Patients with Heart failure, Effect of β‐Blockade
Baker Sarah E.,
Johnson Bruce D.,
Snyder Eric M.
the faseb journal
Asthma, chronic obstructive pulmonary disease, and other respiratory disorders often occur concurrently with heart failure (HF). HF patients with respiratory disease can improve lung function and, therefore, quality of life with β‐agonists. Beta‐agonist use remains controversial as it has been linked with increased mortality risk; however, recent studies that account for co‐morbidities find no association between β‐agonist use and mortality. Previous studies exploring the cardiovascular effect of β‐agonist use in HF are primarily retrospective and focus on heart rate (HR). We have previously demonstrated altered cardiovascular function in response to albuterol in healthy subjects. In the present study we sought to comprehensively assess the cardiovascular effects of albuterol sulfate using cardiac output (Q), stroke volume (SV), HR, systolic, diastolic, and mean arterial blood pressure (SBP, DBP, MAP, respectively) and systemic vascular resistance (SVR). We hypothesized that cardiovascular parameters would be altered 30‐minutes following albuterol administration, and that HF patients using β‐blockers would have an attenuated response. Twenty‐two healthy and twenty‐two HF subjects were recruited (age=56±13 vs. 62±12yrs; height=175±10 vs. 176±9cm; weight=78±15 vs. 93±20; BMI=26±4 vs. 30±6; and BSA=2.08±0 vs. 1.93±0m 2 , for healthy and HF, respectively, p<0.05 for weight, BMI, and BSA). We found that HR and Q increased in healthy but not HF subjects at 30min following albuterol. Patients who were not on β‐blockers (n=4, 18%) had an increase in SV and a decrease in SVR with albuterol, while there was no change in patients who were on β‐blockers (n=14, 64%). These data suggest that HF patients have an attenuated cardiovascular response to inhaled albuterol, particularly with concurrent β‐blocker usage.
Subject(s)agonist , anesthesia , asthma , blood pressure , cardiology , heart failure , heart rate , medicine , receptor , vascular resistance
SCImago Journal Rank1.709
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