Left ventricular outflow tract and mid-cavity obstruction may cause false-positive dobutamine stress echocardiograms.
نویسندگان
چکیده
Left ventricular (LV) outflow tract obstruction (LVOTO) occurs in up to 20% of patients undergoing dobutamine stress echocardiography (DSE). Mid-cavity LV obstruction occurs less commonly during DSE. LV regional wall motion abnormalities during DSE may occur despite normal coronaries due to hypertensive blood pressure response and takotsubo stress cardiomyopathy. We describe herein two cases of LVOTO and one case of mid-cavity LV obstruction during DSE associated with transient apical hypokinesis.
منابع مشابه
Dynamic Intraventricular Obstruction During Dobutamine Stress Echocardiography
Background. The implications of hypotension occurring during dobutamine stress echocardiography have not been elucidated. We observed in some patients that hyperdynamic left ventricular function developed during dobutamine stress echocardiography and hypothesized that intracavitary obstruction was occurring and might account for hypotension in some patients. Methods and Results. Fifty-seven con...
متن کاملDobutamine stress echocardiography unmasks acute worsening of mitral regurgitation with latent left ventricular outflow tract obstruction behind diastolic heart failure in hypertensive heart disease.
In a 57-year-old woman who was referred as refractory diastolic heart failure, dobutamine stress echocardiography facilitated the diagnosis of acute worsening of mitral regurgitation accompanied with latent left ventricular outflow tract obstruction as a cause of recurrent flash pulmonary edema. Echocardiography revealed the presence of sigmoid septum and concentric left ventricular hypertrophy...
متن کاملDobutamine-induced midcavitary gradients do not cause dyspnea
Introduction Left ventricular outflow tract (LVOT) and midcavitary gradients are common during dobutamine stress echocardiography. Some consider these gradients to be of no clinical significance. However, severe dobutamine-induced obstruction has been associated with chest pain and dyspnea, abnormalities in ventricular wall motion, and shock. These associations suggest that dobutamine-induced g...
متن کاملSystolic closure of aortic valve in patients with prosthetic mitral valves.
Systolic closure of the aortic valve was found in 10 of 36 patients who underwent mitral valve replacement. Eight patients had early systolic closure, and two had mid-systolic closure. The left ventricular outflow tract dimension on M-mode and two dimensional echocardiograms, left ventricular posterior wall and septal thickness, left ventricular dimensions in systole and diastole, aortic valve ...
متن کامل[SAM not only in hypertrophic cardiomyopathy].
Hypertrophic obstructive cardiomyopathy with significant hypertrophy of the basal septum is the most frequently reported cause of left ventricular outflow tract obstruction (LVOTO) in the mechanism of systolic anterior movement (SAM). Additionally, other conditions such as dehydration, vasodilatation, mitral valve repair, dobutamine stress echocardiography and pheochromocytoma have been associa...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- European journal of echocardiography : the journal of the Working Group on Echocardiography of the European Society of Cardiology
دوره 12 3 شماره
صفحات -
تاریخ انتشار 2011