Longitudinal strain is afterload dependant in severe aortic stenosis
نویسندگان
چکیده
منابع مشابه
Myocardial contractility and afterload in aortic stenosis
Background In aortic stenosis(AS) with normal left ventricular ejection fraction(LV EF), circumferential and longitudinal systolic strains(CSt, LSt) are reduced but the underlying mechanisms are uncertain. Conventional indices of afterload(A) per unit of myocardium are suboptimal for strain analysis and based on inaccurate assumptions about myocardial properties, while conventional contractilit...
متن کاملExercise-induced changes in left ventricular global longitudinal strain in asymptomatic severe aortic stenosis.
BACKGROUND The management of patients with asymptomatic severe aortic stenosis (ASAS) is still under discussion. Therefore, it is advisable to search for the parameters of early damage to left ventricular (LV) function. AIM The aim of the study was to assess exercise-induced changes in LV global longitudinal strain (GLS) in ASAS. METHODS The ASAS group consisted of 50 patients (26 women and...
متن کاملInvasive measures of afterload in low gradient severe aortic stenosis with preserved ejection fraction.
BACKGROUND The pathophysiology of low flow, low gradient severe aortic stenosis (LGSAS) with preserved ejection fraction is poorly understood. It has been proposed that abnormalities of arterial circulation are a major contributor to this syndrome. METHODS AND RESULTS We invasively examined systemic arterial afterload (effective arterial elastance, Ea; total arterial compliance, Ca; and syste...
متن کاملSevere calcific aortic stenosis
he physical forces that impede myocardial shortening afterload) are highly relevant to pharmacologic, mechanial, and surgical treatments for left ventricular systolic ysfunction. The maintenance of a normal or near-normal fterload, matched appropriately to robust myocardial conractility and accompanied by adequate venous return and eart rate, together ensure the teleologic cardiac function of e...
متن کاملEchocardiography in Severe Aortic Stenosis
Aortic stenosis (AS) is the most frequent valvular heart disease in west developed and developing countries, with prevalence between 0.02% in adults under 44 years and 3-9% in elderly over 80 years. Patients with this disease may remain asymptomatic for years, particularly in elderly with naturally limited exercise. If the patients remain untreated after they become symptomatic, the mortality a...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Archives of Cardiovascular Diseases
سال: 2013
ISSN: 1875-2136
DOI: 10.1016/j.acvd.2013.03.013