Abstract
In this study we aimed to investigate the arterial blood gase changes in noncomplicated acute myocardial infaretion (AM[) patients, and the relationship between these changes and the electrocardiographic localizations of the myocardial infarction. It was performed between July 1995 and January 1996 in SSK Istanbul Hospital Coronary Care Unit. The study included 62 AMI cases (51 men, ll women) and 25 healthy subjects (15 men, 10 women) as the control group. Mean age was 56.9 ± 8.8 for the study group and 48.2 ± 7.2 for the control group. The AMI cases included in the study were divided into 4 groups as Anterior AMI, Inferior AMI, Inferior + Right ventricle AMI, Non Q wave AMI according to electrocardiographic findings. Arterial blood gases were measured at the first three days in AMI patients. When the total MI cases und the control group were compared with respect to PaCo2, pH and HC03- values, there were statistically significant differences between the groups (p<O.OOOl, p<0.05, p<0.05 respectively). Whereas, when the groups were compared with respect to Na, K and COHb values,no significant difference was seen between the total AMI cases and the control group. When the blood gase values were evaluated according to the localization of myocardial infarction, Inferior+Right ventricle AMI group was found to have significantly lower values compared to Inferior AMI and Non Q wave AMI (p<0.05). Other parameters (Pa02, HC03-, Na, K, Ca, pH, COHb) were also compared according to the localization of myocardial infaretion and no significant difference was detected. It is cocluded that, evethough couldn't be clinically detected, AMI leads to fluid accumulation in the lung interstitium by increasing left ventricular end-diastolic pressure, and the hypoxemia results from ventilation-perfusion mismatch and pulmonary arteriovenous shunt.
Keywords: Preoperative care and routine
