Biomedical subjects

R B Lynn

Publications and source records attributed to R B Lynn.

At least 55 records · Page 3Linked to original sources

PubMed1978

Monitoring of electroencephalogram during open-heart surgery. A prospective analysis of 118 cases.

The electroencephalogram (EEG) was prospectively analyzed in 118 consecutive open-heart procedures. In 96 patients (81%) the records were normal whereas in 22 patients (19%) the EEG showed slow wave activity and decreased electrical voltage. In 16 of these patients the EEG abnormality was transient or only of mild degree. In 10 of this group of patients the abnormality occurred with the institution of total cardiopulmonary bypass (CPB) and returned to normal within 2 minutes. In four other patients the abnormalities were mild, persisted to the end of the CPB, and then returned to normal; in two patients the EEG abnormalities developed in the last half of CPB and then returned to normal. In the remaining six patients the EEG was grossly abnormal. In one of these patients the abnormality was secondary to a previous stroke. In five patients, however, the EEG alerted the surgeon to an otherwise unsuspected poor cerebral blood flow. A serious neurologic insult was probably prevented by identifying and correcting the mechanical cause.

Adolescent↗

PubMed1978

Submitral annular left ventricular aneurysm--unusual echocardiographic and angiographic features.

A submitral annular left ventricular aneurysm in a Nigerian patient is described. The features consisted of an abnormal bulge on the left heart border with curvilinear calcification, an echo-free space behind the posterior left ventricular wall, and unusual angiographic appearance of the left circumflex coronary artery. The diagnosis was confirmed by pulmonary artery and left ventricular angiography. The patient underwent open heart surgery and a multiloculated submitral annular left ventricular aneurysm which was adherent to the pericardium was successfully resected.

Adult↗

PubMed1978

Arch versus femoral artery perfusion during cardiopulmonary bypass.

Aortic arch perfusion is favored by most cardiac surgeons. Perfusion via the femoral artery is still used sporadically at reoperations for aneurysms of the ascending aorta, or for the institution of partial pump support in very sick patients prior to opening of the chest. Our over-all experience indicates that surgical complications occurred primarily in the group of patients perfused via the femoral artery. On the other hand, serious disturbance in cerebral perfusion, as determined by electroencephalogram (EEG) monitoring, occurred in 7 percent of the patients perfused via the arch and 3 percent of those perfused via the femoral artery, a difference that was not statistically significant. We continue to advocate aortic arch cannulation and EEG monitoring during cardiopulmonary bypass procedures.

Adolescent↗

PubMed1977

Tracheal leiomyosarcoma: a unique cause of stridor.

A 26-year-old man presented with a 2-week history of hemoptysis and progressive upper airway obstruction. Roentgenograms and bronchoscopy confirmed a tracheal tumor, and a primary leiomyosarcoma was resected.

Adolescent↗

PubMed1975