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Biomedical subjects

R J Baird

Publications and source records attributed to R J Baird.

88 records · Page 5Linked to original sources
PubMed1966

Survey of mechanical assistance of the circulation and the present status of left-heart bypass.

The various types of mechanical circulatory assistance which recently have been developed are described. The techniques which appear to be most promising for clinical application are: veno-arterial bypass with oxygenation, synchronous arterial assistance, and closed-chest left-heart bypass.The effects of a left ventricular bypass on central hemodynamics and the oxygen requirements of the left ventricle are described. A bypass of 90% of the left ventricular output brings about a 30% reduction in the left ventricular myocardial oxygen requirement. Left atrial pressure is reduced. The central aortic mean pressure, the pulmonary artery pressure, and the right atrial pressure are not changed.

Animals↗
PubMedDate not supplied

Sinus of Valsalva repair for annulo-aortic ectasia and aortic insufficiency.

OBJECTIVE: The standard treatment of ascending aortic aneurysms (AsAAs) with annulo-aortic ectasia and aortic insufficiency has been composite graft replacement of the valve and ascending aorta. The authors propose a method of repair which preserves the native aortic valve and correct the aneurysmal dilation of the sinus of Valsalva yet preserves its normal shape. PATIENTS/INTERVENTIONS: Two patients with large AsAAs and severe aortic insufficiency had operative repair by plication of the sinuses of Valsalva which maintained the normal sinus shape and restored coaptation of the aortic leaflets. MAIN RESULTS: Late postoperative echocardiography revealed only mild aortic insufficiency in both patients and no evidence of further sinus dilation. CONCLUSIONS: Repair of the sinus of Valsalva preserves the aortic valve and native coronary ostia, can correct existing aortic insufficiency and can provide a good functional result without the need for anticoagulation.

Adult↗