Use of Pulmonary Artery Catheters in Patients with Acute Myocardial Infarction: Materials and Methods (2)
Hospital discharge summaries were studied of those patients receiving PAC who were not in “pump failure” to assess indications for PAC and causes of death in those who died in the hospital. In order to assess severity of CHF in the absence of cardiogenic shock and persistent hypotension, hospital discharge summaries were studied of the patients with CHF who received PAC (data available in 118 patients), as well as those of 246 age- and sex-matched patients who did not receive PAC. Their CHF was classified as mild, moderate or severe according to the following criteria:
Mild— Dyspnea, and/or basal lung crepitations and/or “congestion” on chest x-ray film, or those described in the discharge summary as “mild.” buy flovent inhaler
Moderate— Severe dyspnea, with extensive basal lung-crepi-tations, marked pulmonary congestion on chest x-ray film but not in pulmonary edema or those described in the discharge summary as “moderate.”
Severe— Features of pulmonary edema, clinical, radiologic or both.
Frequency of PAC between groups and the dependency of mortality on the presence or absence of PAC were examined by the chi-square test. The univariate and multivariate estimation of the relative odds of in-hospital (as well as one-year) mortality associated with the implementation of PAC were calculated using logistic regression based on maximum likelihood estimation of parameters using the CATMOD procedure of the SAS Institute.