Medical News (Page 2)

Bronchoscope

Canadian Neighbor Pharmacy: Discussion of Palliation of Bronchogenic Carcinoma with 198Au Implantation Using the Fiberoptic Bronchoscope

Most patients with malignant disease of the lungs will, at some time in their course, require palliative therapy. Previously, this has centered on radiotherapy for non-small cell and chemotherapy and/or radiotherapy for small cell tumors. The prospects for those who remain symptomatic or whose symptoms recur after maximum tolerated radiotherapy…

Aortic Stenosis

Exercise Testing in Patients with Aortic Stenosis: Exercise Testing

Exercise Testing in Subjects with Aortic Stenosis Although studies have delineated possible mechanisms for effort syncope in aortic stenosis, a review of the literature (Thble 1) demonstrates rare complications from exercise testing when performed with appropriate caution and monitoring. Although used predominantly in pediatric cardiology to assess congenital aortic stenosis…

Aortic Stenosis

Exercise Testing in Patients with Aortic Stenosis: Syncope—carotid hyperreactivity

Exercise Testing in Patients with Aortic Stenosis: Syncope—carotid hyperreactivity

Four mechanisms leading to decreased cerebral perfusion and syncope—carotid hyperreactivity, left ventricular failure, arrhythmia, and left ventricular baroreceptor stimulation—were addressed by Richards et al. They studied four subjects with aortic stenosis (three with syncope, one with heart failure) using electrocardiographic and pressure monitoring of the pulmonary and brachial arteries. During…

Aortic Stenosis

Exercise Testing in Patients with Aortic Stenosis: Syncope during exercise

Perhaps the most plausible explanation for syncope during exercise in patients with aortic stenosis is left ventricular stretch baroreceptor or mechano-receptor stimulation with concomitant arterial hypotension, reduced venous return, and bradycardia. Ross and colleagues demonstrated that elevation of left atrial and left ventricular pressures in dogs caused a decrease in…