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Risk for postoperative congestive heart failure.

M E Charlson1, C R MacKenzie, J P Gold

  • 1Department of Medicine, Cornell University Medical College, New York, New York 10021.

Surgery, Gynecology & Obstetrics
|February 1, 1991
PubMed
Summary

Preoperative cardiac disease and diabetes are key predictors of postoperative congestive heart failure (CHF). Intraoperative blood pressure fluctuations increase CHF risk, while adequate fluid intake may reduce it.

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Area of Science:

  • Cardiology
  • Anesthesiology
  • General Surgery

Background:

  • Postoperative congestive heart failure (CHF) is a significant complication, particularly in high-risk patients.
  • Identifying predictors is crucial for risk stratification and management in elective surgeries.

Purpose of the Study:

  • To identify predictors of postoperative congestive heart failure (CHF) in patients undergoing elective general operations.
  • To assess the impact of preoperative conditions and intraoperative parameters on CHF development.

Main Methods:

  • A study of 254 patients, focusing on those with hypertension and diabetes.
  • Analysis of preoperative cardiac status, diabetes, intraoperative mean arterial pressure (MAP) fluctuations, and fluid balance (net intake).

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Main Results:

  • Postoperative CHF occurred in 6% of patients.
  • Patients with preoperative cardiac disease had a significantly higher incidence (17%) compared to those without (<1%).
  • Diabetic patients had increased risk (12%), especially if they also had cardiac disease.
  • Large intraoperative MAP fluctuations (≥40 mmHg change) correlated with increased CHF risk (p<0.02).
  • Low net fluid intake (<500 mL/hr) was associated with higher failure rates (p<0.03).

Conclusions:

  • Risk for postoperative CHF is concentrated in patients with symptomatic preoperative cardiac disease, particularly when combined with diabetes.
  • Intraoperative MAP variability is an independent risk factor for postoperative CHF.
  • Adequate intraoperative fluid administration appears to be protective against postoperative CHF.