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A Minimally Invasive Model of Aortic Stenosis in Swine
Published on: October 20, 2023
Aortic stenosis
1Depatment of Medicine, Divisions of Cardiology, Geriatrics, and Pulmonary/Critical Care, New York Medical College, Macy Pavilion, Room 138, Valhalla, NY 10595, USA. wsaronow@aol.com
Insights
Aortic stenosis (AS) patients face higher risks of heart issues. Early diagnosis and timely aortic valve replacement (AVR) are crucial for managing severe AS and preventing complications.
Area of Science:
- Cardiology
- Vascular Medicine
Background:
- Aortic stenosis (AS) is linked to increased coronary risk factors and atherosclerotic disease.
- Statins may potentially slow AS progression.
- Classic severe AS symptoms include angina, syncope, and heart failure.
Purpose of the Study:
- To outline the diagnosis and management of aortic stenosis.
- To detail treatment strategies based on AS severity and patient factors.
Main Methods:
- Physical examination findings, including murmur characteristics, aid in differentiating AS severity.
- Doppler echocardiography is the primary diagnostic tool for AS presence and severity assessment.
Main Results:
- Severe AS necessitates aortic valve replacement (AVR) once symptoms manifest.
- Anticoagulation post-AVR depends on valve type and patient risk factors.
Conclusions:
- Warfarin is indicated for mechanical valves or bioprosthetic valves with specific risk factors (atrial fibrillation, thromboembolism, LV dysfunction, hypercoagulable state).
- Aspirin (75-100 mg daily) is recommended for bioprosthetic valves without these risk factors.
Abstract:
Patients with aortic stenosis (AS) have an increased prevalence of coronary risk factors, coronary artery disease, and other atherosclerotic vascular disease and an increased incidence of coronary events and death. Statins may reduce the progression of AS. Angina pectoris, syncope or near syncope, and heart failure are the three classic manifestations of severe AS. Prolonged duration and late peaking of an aortic systolic ejection murmur best differentiate severe AS from mild AS on physical examination. Doppler echocardiography is used to diagnose the presence and severity of AS. Once symptoms develop, aortic valve replacement (AVR) should be performed in patients with severe or moderate AS. Warfarin should be administered indefinitely after AVR in patients with a mechanical aortic valve and in patients with a bioprosthetic aortic valve who have either atrial fibrillation, prior thromboembolism, left ventricular systolic dysfunction, or a hypercoagulable condition. Patients with a bioprosthetic aortic valve without any of these four risk factors should be treated with aspirin 75-100 mg daily.
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