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It is important that the medical profession play a significant role in critically evaluating the use of diagnostic procedures and therapies as they are introduced in the detection, management,

/pdf/acc-aha-2006-guidelines-for-the-management-of-patients-with-27qfh9fc7i.pdf

ACC/AHA 2006 Guidelines for the Management of Patients With Valvular Heart Disease

2008 Focused Update Incorporated Into the ACC/AHA 2006 Guidelines for the Management of Patients With Valvular Heart Disease: A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Writing Committee to Revise the 1998 Guidelines for the Management of Patients With Valvular Heart Disease) Endorsed by the Society of Cardiovascular Anesthesiologists, Society for Cardiovascular Angiography and Interventions, and Society of Thoracic Surgeons

https://cdr.lib.unc.edu/downloads/4m90dx441

ACC/AHA 2006 Guidelines for the Management of Patients With Valvular Heart Disease. A Report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Writing Committee to Revise the 1998 Guidelines for the Management of Patients With Valvular Heart Disease)

/pdf/2008-focused-update-incorporated-into-the-acc-aha-2006-58mkrquur7.pdf

2008 Focused Update Incorporated Into the ACC/AHA 2006 Guidelines for the Management of Patients With Valvular Heart Disease

ACC/AHA PRACTICE GUIDELINES—EXECUTIVE SUMMARY ACC/AHA 2006 Practice Guidelines for the Management of Patients With Valvular Heart Disease: Executive Summary

Reoperation of the aortic valve in octogenarians.

BACKGROUND AND AIM OF THE STUDY Transcatheter aortic valve implantation (TAVI) is used as an alternative to conventional surgery in high-risk patients. The EuroSCORE quantifies the risk, and patients are selected for this procedure if their predicted mortality is high. The study aim was to evaluate the risk discrimination and calibration of the EuroSCORE, as well as the surgical judgment that is used when selecting the aortic valve replacement (AVR) approach. METHODS Between 2003 and 2006, a total of 2757 patients underwent isolated, open AVR. The EuroSCORE was compared to the observed in-hospital mortality. A survey among surgeons assessed the relevance of patient-specific factors towards the approach of TAVI versus open AVR. RESULTS Survivors of AVR had a lower additive EuroSCORE than non-survivors (7.2 +/- 3.34 versus 12.0 +/- 3.34; p < 0.001). The EuroSCORE demonstrated reasonable risk stratification (c-statistic 0.843, p < 0.001). However, none of the 67 non-survivors was correctly predicted (Hosmer-Lemeshow test; p < 0.001), and most patients with a high EuroSCORE survived AVR. The actual mortality was 2.8% as compared to a EuroSCORE-predicted mortality of 12.5 +/- 14.2% (p < 0.001). This poor calibration was worse with higher EuroSCOREs (Cusum test; p < 0.001). Surgeons identified a porcelain aorta as the only factor that warranted TAVI. Most EuroSCORE variables had either no relevance for treatment selection, or prompted open AVR. CONCLUSION Patient selection for TAVI cannot be based on the EuroSCORE, because it lacks discrimination and center-specific calibration. Thus, individual, surgical judgment that weighs institutional expertise for high-risk patients against a possible reduction of mortality by using interventional techniques, is recommended.

EuroSCORE-predicted mortality and surgical judgment for interventional aortic valve replacement.

Aortic valve surgery following previous coronary artery bypass grafting: Impact of calcification and leaflet movement

Background and aims of the study Optimal management of patients with coronary artery disease and concomitant aortic valve stenosis remains a subject of controversy. In this retrospective study, an attempt was made to identify criteria indicating rapid progression of aortic valve stenosis in patients with coronary artery disease. Methods Between 1990 and 1999, 47 patients underwent aortic valve replacement (AVR) after previous coronary artery bypass grafting (CABG) at the authors' institution. The postoperative data, including cardiac catheterization films, were reviewed. Results Aortic valve disease, mainly aortic stenosis, showed a rapid rate of progression. During a mean interval between CABG and AVR of 5.9 +/- 2.9 years, the mean peak-to-peak pressure gradient across the aortic valve rose from 16.1 +/- 13.8 to 61.4 +/- 23.9 mmHg in patients where presence of calcification and impaired aortic valve motion was found (66.0% of patients had calcified aortic valves; 72.3% had impaired valve motion) at the time of CABG; whereas in those without calcification and/or impaired leaflet motion a mean of 9.2 +/- 0.8 years elapsed before AVR became necessary. Conclusion If a patient must undergo surgery for coronary artery disease, then AVR should be considered not only on the basis of hemodynamic criteria but also with regard to calcification of the aortic valve and its leaflet motion.

The prognostic value of calcification and impaired valve motion in combined aortic stenosis and coronary artery disease.

BACKGROUND AND AIM OF THE STUDY The study aim was to investigate whether: (i) by detection of changing acoustic sound phenomena, minimal changes in prosthetic valve function may be detected earlier than with echocardiography, invasive diagnosis or clinically; (ii) patients can record and pass on signals with a high level of reproducibility from any location via the Internet; and (iii) clinical data evaluation permits conclusions to be drawn on changes in the functional state of a prosthetic replacement valve. METHODS Simulation studies were carried out using a mock circulation device. Aortic valve replacement (AVR) using extracorporeal circulation was performed in pigs, valve function was artificially disturbed, and valve sounds were recorded. Patients were equipped with briefcase-like devices to record their valve sounds after AVR and to transfer them via the Internet. RESULTS Simulation studies produced a typical sound spectrum for each tested valve that remained constant under variable conditions. Experiments in animals proved that minimal changes in prosthetic valve function led to a significant change in the sound phenomena. The degree of sensitivity was significantly greater than that in echocardiographic control experiments. All patients in the clinical study regularly recorded and passed on their signals. Surveys revealed high acceptance and easy handling of the compiled devices. Valve dysfunctions were not detected. CONCLUSION On-line registration of acoustic sound phenomena and ECG seems suited to detect minimal changes in prosthetic function. In particular, the registration of flow, acoustics and ECG envisaged at the next level opens up diverse potential applications for Internet-based, remote monitoring of patients following cardiac surgery or cardiologic treatment.

Thomas Eitz

Papers

Reoperation of the aortic valve in octogenarians.

EuroSCORE-predicted mortality and surgical judgment for interventional aortic valve replacement.

Aortic valve surgery following previous coronary artery bypass grafting: Impact of calcification and leaflet movement

The prognostic value of calcification and impaired valve motion in combined aortic stenosis and coronary artery disease.

Acoustic phenomena and valve dysfunction in cardiac prostheses: data acquisition and collection via the Internet.