Propranolol decreases cardiac work in a dose-dependent manner in severely burned children

Felicia N. Williams, David Herndon, Gabriela A. Kulp, Marc G. Jeschke

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Background: Severe burn is followed by profound cardiac stress. Propranolol, a nonselective β1, β2-receptor antagonist, decreases cardiac stress, but little is known about the dose necessary to cause optimal effect. Thus, the aim of this study was to determine in a large, prospective, randomized, controlled trial the dose of propranolol that would decrease heart rate ≥15% of admission heart rate and improve cardiac function. Four-hundred six patients with burns >30% total body surface area were enrolled and randomized to receive standard care (controls; n = 235) or standard care plus propranolol (n = 171). Methods: Dose-response and drug kinetics of propranolol were performed. Heart rate and mean arterial pressure (MAP) were measured continuously. Cardiac output (CO), cardiac index, stroke volume, rate-pressure product, and cardiac work (CW) were determined at regular intervals. Statistical analysis was performed using analysis of variance with Tukey and Bonferroni corrections and the Student t test when applicable. Significance was accepted at P < .05. Results: Propranolol given initially at 1 mg/kg per day decreased heart rate by 15% compared with control patients, but was increased to 4 mg/kg per day within the first 10 days to sustain treatment benefits (P < .05). Propranolol decreased CO, rate-pressure product, and CW without deleterious effects on MAP. The effective plasma drug concentrations were achieved in 30 minutes, and the half-life was 4 hours. Conclusion: The data suggest that propranolol is an efficacious modulator of the postburn cardiac response when given at a dose of 4 mg/kg per day, and decreases and sustains heart rate 15% below admission heart rate.

Original languageEnglish (US)
Pages (from-to)231-239
Number of pages9
JournalSurgery
Volume149
Issue number2
DOIs
StatePublished - Feb 2011

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Propranolol
Heart Rate
Cardiac Output
Arterial Pressure
Pressure
Body Surface Area
Burns
Stroke Volume
Half-Life
Analysis of Variance
Randomized Controlled Trials
Pharmacokinetics
Students
Pharmaceutical Preparations

ASJC Scopus subject areas

  • Surgery

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Propranolol decreases cardiac work in a dose-dependent manner in severely burned children. / Williams, Felicia N.; Herndon, David; Kulp, Gabriela A.; Jeschke, Marc G.

In: Surgery, Vol. 149, No. 2, 02.2011, p. 231-239.

Research output: Contribution to journalArticle

Williams, Felicia N. ; Herndon, David ; Kulp, Gabriela A. ; Jeschke, Marc G. / Propranolol decreases cardiac work in a dose-dependent manner in severely burned children. In: Surgery. 2011 ; Vol. 149, No. 2. pp. 231-239.
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abstract = "Background: Severe burn is followed by profound cardiac stress. Propranolol, a nonselective β1, β2-receptor antagonist, decreases cardiac stress, but little is known about the dose necessary to cause optimal effect. Thus, the aim of this study was to determine in a large, prospective, randomized, controlled trial the dose of propranolol that would decrease heart rate ≥15{\%} of admission heart rate and improve cardiac function. Four-hundred six patients with burns >30{\%} total body surface area were enrolled and randomized to receive standard care (controls; n = 235) or standard care plus propranolol (n = 171). Methods: Dose-response and drug kinetics of propranolol were performed. Heart rate and mean arterial pressure (MAP) were measured continuously. Cardiac output (CO), cardiac index, stroke volume, rate-pressure product, and cardiac work (CW) were determined at regular intervals. Statistical analysis was performed using analysis of variance with Tukey and Bonferroni corrections and the Student t test when applicable. Significance was accepted at P < .05. Results: Propranolol given initially at 1 mg/kg per day decreased heart rate by 15{\%} compared with control patients, but was increased to 4 mg/kg per day within the first 10 days to sustain treatment benefits (P < .05). Propranolol decreased CO, rate-pressure product, and CW without deleterious effects on MAP. The effective plasma drug concentrations were achieved in 30 minutes, and the half-life was 4 hours. Conclusion: The data suggest that propranolol is an efficacious modulator of the postburn cardiac response when given at a dose of 4 mg/kg per day, and decreases and sustains heart rate 15{\%} below admission heart rate.",
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