The Journal of thoracic and cardiovascular surgery
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J. Thorac. Cardiovasc. Surg. · Mar 1980
Ultrastructural and cytochemical correlates of myocardial protection by cardiac hypothermia in man.
We report observations on ultrastructural and cytochemical changes in the myocardium after hypothermic protection in 21 patients who underwent cardiac operation. Two general categories of hypothermic protection were studied. (1) topical cooling during anoxic arrest and moderate general hypothermia (10 patients with aortic valve replacement, Group 1) and (2) intermittent perfusion during moderate general hypothermia combined with topical cooling (11 patients with multiple valve replacement, Group II). Transmural left ventricular biopsies were taken at the start of the cardiopulmonary bypass and shortly after the end of aortic cross-clamping. ⋯ Cytochrome-c-oxidase activities decreased in these samples. It is concluded that: (1) no significant subcellular injury was found in hearts cooled topically during 1 hour of anoxic arrest; and (2) in hearts protected by intermittent perfusion during moderate general hypothermia and additional external cooling, the subendocardium was well preserved for anoxic periods of up to 106 minutes. However, after 60 minutes of aortic cross-clamping subcellular damage increased progressively in the subepicardium.
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J. Thorac. Cardiovasc. Surg. · Feb 1980
Comparative StudyComparison of lobectomy and wedge resection for carcinoma of the lung.
To evaluate comparatively lobectomy and wedge resection for carcinoma of the lung, we reviewed retrospectively 1,000 consecutive cases of lung cancer at a Veterans Administration Hospital. Of these cases, 252 were operable; 199 were resectable. Thirty-three patients underwent resection of their lesion as primary treatment. ⋯ One, 2, and 5 year survival rates were 85%, 58%, and 26%, respectively, for wedge resection and 75%, 55%, and 25%, respectively, for lobectomy. The operative mortality rate was 0% for wedge resection and 5% for lobectomy. These results indicate that for the patient with a peripheral lung carcinoma and no evidence of metastatic disease a wedge resection offers comparable survival rates with minimal risk of death.
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J. Thorac. Cardiovasc. Surg. · Jan 1980
Clinical experience with the activated clotting time for the control of heparin and protamine therapy during cardiopulmonary bypass.
The clinical experience with the activated clotting time (ACT) for the control of heparin and protamine therapy during cardiopulmonary bypass in 70 patients (50 adults and 20 children) is reviewed. After a standard dose of 2 mg/kg of body weight of heparin, the patient's ACT ranged from 210 to more than 600 seconds. ⋯ Although the postoperative drainage was not significantly decreased, the total amount of blood transfusion and fresh-frozen plasma and platelet requirements were reduced by 30%, 20%, and 20% respectively. The simple, easy-to-use protocol is presented in detail.
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J. Thorac. Cardiovasc. Surg. · Nov 1979
Simple method for measurement of cardiac output by thermodilution after cardiac operation.
Cardiac output by the thermodilution technique was measured by a new No. 2 Fr. transthoracic (2F-TT) thermistor catheter placed at cardiac operation into the pulmonary artery directly through the right ventricular outflow tract. Cold (0 degree C) 5% dextrose in water (D5W) was used as indicator and injected through a percutaneously placed central venous pressure (CVP) catheter in the jugular vein. Comparison to the No. 7 Fr. ⋯ No difficulty was experienced in insertion or removal of the 2F-TT catheter and no bleeding complications were noted. Experiments in six dogs showed that variation in position of the tip of the CVP catheter within the superior vena caval venous system and right atrium was not a critical factor in measurement of thermodilution cardiac output. The thermodilution cardiac output technique in general and the ease of insertion, as well as the small size of the 2F-TT catheter, should make this method especially advantageous in infants and small children.