Dr.Bogart, Is this "LV-4.5 cm" typing error,because I thought Left Ventricle ID (dia -cm) upper normal range is bigger than that or is "LV-4.5 cm" upper normal range for Left Venvricle ID (sys - cm)? 2. What is upper normal range for Left Ventricle ID (dia - cm) and Mid Ascending Aorta for the below person(both athletic and sedentary types)? 3. When Lown criteria is no longer valid does this means left ventricle trigeminy beats are less dangerous than left ventricular couplets in structually normal hearts and not structually normal hearts?Thank you for follow up questions?
The range for the left ventricle in diastole is about 3.7 to 5.6 cm and it can vary related to the persons surface area--larger with larger surface area. The aorta can lso vary but I am not aware that athletes have a larger aortic root. The left ventricle does get bigger with aerobic training.
The Lown criteria no longer is considered valid because in the absence of heart disease trigeminy is no worse than couplets or even non-sustained ventricular tachycardia.
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