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Mechanical Heart Valve noise when attached to a dacron prosthesis to replace the aortic root and the ascending aorta

..Moving on from the previous post regarding the noise test from 3 of the leading mechanical heart valves this is another test result - interestingly enough regarding the noise of mechanical heart valves when attached to an artificial prothesis.

In my case this is most significant as with my Type A Aortic Dissection my MHV was sewn into a dacron prothesis (which is known as a "Bentall procedure" involving A composite graft replacement of the aortic valve, aortic root and ascending aorta, with re-implantation of the coronary arteries into the graft).

Here's the story:

cheers

Graeme


Heart Valve Sound of Various Mechanical Composite Grafts, and the Impact on Patients’ Quality of Life

Karl Golczyk, Martin Kompis, Lars Englberger, Thierry P. Carrel, Mario Stalder
Departments of Cardiovascular Surgery and ENT, University Hospital Berne, Switzerland

Background and aim of the study: The closing sounds of mechanical heart valves can be disturbing for patients and their closest relatives. Although some investigations into mechanical heart valve sounds have been performed, the particularities of the valve sound when it is attached to a vascular prosthesis to replace the aortic root and the ascending aorta has not been studied to date. The study aim was to compare the closing sounds of three various mechanical composite graft prostheses, and to analyze the impact of such sounds on the patients’ quality of life.
Methods: Thirty patients who had undergone aortic root replacement were prospectively randomized into three groups, receiving either a Sorin, St. Jude Medical (SJM) or ATS mechanical composite graft. Valve sounds were recorded with microphones, and sound pressures at peak measured at three months after operation. Patients were interviewed at three and six months after surgery to assess subjective disturbance, using both an analog scale from 1 to 10

and a more detailed questionnaire.
Results: Sound pressures at peak tended to be lower for the ATS than for the SJM and Sorin composite grafts (44.4 ± 3.1 dB versus 47.8 ± 3.1 dB and 46.6 ± 6.0 dB; p = NS). The overall subjective disturbance with ATS valves scored significantly lower than the SJM and Sorin composite grafts (2.5 ± 1.6 versus 4.1 ± 1.7 and 4.6 ± 2.2; p <0.05 after three months; and 2.6 ± 1.2 versus 4.4 ± 2.3 and 4.4 ± 3.3; p <0.05 after six months). Scores for disturbance during daily activities, sleep disturbance and audibility to relatives were lowest for the ATS composite grafts.
Conclusion: The sound pressure of ATS composite grafts was slightly (p = NS) lower than that of SJM and Sorin composite grafts. Patients who received an ATS composite graft were significantly less disturbed by the valve noise than those with SJM and Sorin composite grafts.


The Journal of Heart Valve Disease 2010;19:228-232

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