نتایج جستجو برای: lv velocity

تعداد نتایج: 158157  

2005
W. PETER C. RICHARD CONTI

A catheter-tip velocity transducer with two high-fidelity pressure manometers was used to evaluate the left ventricular (LV) hemodynamic effects of intravenous propranolol (10 mg). Nine patients without clinical evidence of heart failure were studied. Pulsatile ascending aortic blood flow velocity and pressure and LV pressure were measured continuously during drug administration. Beat-to-beat c...

Journal: :Heart 2004
P Schuster S Faerestrand O J Ohm

OBJECTIVE To quantify long term effects of cardiac resynchronisation therapy (CRT) by biventricular pacing in patients with heart failure (HF). METHODS Regional changes in left ventricular (LV) contraction patterns effected by CRT in 19 patients with HF (12 with ischaemia; mean (SD) age 66 (9) years) with bundle branch block were examined by colour Doppler tissue velocity imaging (c-TVI). Tim...

Journal: :American journal of physiology. Heart and circulatory physiology 2005
Michel Slama Jwari Ahn Marcel Peltier Julien Maizel Denis Chemla Jasmina Varagic Dinko Susic Christophe Tribouilloy Edward D Frohlich

This study was performed to validate echocardiographic and Doppler techniques for the assessment of left ventricular (LV) diastolic function in spontaneously hypertensive rats (SHR) and normotensive Wistar rats. In 11 Wistar rats and 20 SHR, we compared 51 sets of invasive and Doppler LV diastolic indexes. Noninvasive indexes of LV relaxation were related to the minimal rate of pressure decline...

Journal: :European journal of echocardiography : the journal of the Working Group on Echocardiography of the European Society of Cardiology 2011
Zoran B Popović Milind Y Desai Adisai Buakhamsri Chirapa Puntawagkoon Allen Borowski Benjamin D Levine Wilson W H Tang James D Thomas

AIMS Although left ventricular (LV) relaxation is well recognized as a predictor of mitral annulus (MA) early diastolic (E') velocity, its significance relative to other predictors of E' is less well understood. METHODS AND RESULTS We assessed 40 healthy volunteers, 43 patients with acutely decompensated chronic systolic heart failure (HF), and 36 patients with hypertrophic obstructive cardio...

Journal: :Hypertension 1987
J M Gardin J I Drayer M Weber M K Rohan M Knoll V W Shu R Garcia D Brewer W L Henry

Abnormalities in left ventricular (LV) wall thickness and mass have been demonstrated in patients with mild hypertension utilizing M-mode echocardiography. In addition, studies using radionuclide angiography have demonstrated abnormalities in early diastolic LV filling in asymptomatic hypertensive patients with normal ejection fraction and cardiac output. Recently, Doppler recordings of flow ve...

Journal: :Croatian medical journal 2009
Gani Bajraktari Mimoza Berbatovci-Ukimeraj Ali Hajdari Lavdim Ibraimi Irfan Daullxhiu Ymer Elezi Gjin Ndrepepa

AIM To study the left and right ventricular function and to assess the predictors of increased left ventricular (LV) filling pressure in dialysis patients with preserved LV ejection fraction. METHODS This study included 63 consecutive patients (age 57+/-14 years, 57% women) with end-stage renal failure. Echocardiography, including tissue Doppler measurements, was performed in all patients. Ba...

2012
Vahid Reza Dabbagh Kakhki Afsoon Fazli Nezhad Seyed Rasoul Zakavi Esmaeel Rahmani Ramin Sadeghi Narjes-Khatoon Ayati

Introduction: In order to assess echocardiographic left ventricular functional indices in patients with differentiated thyroid carcinoma (DTC), after L-T4 withdrawal (short-term overt hypothyroidism) and during TSH suppressive therapy, we have evaluated cardiac hemodynamics in a single cohort study. Methods: 24 patients with DTC were studied in two phases: 1: at least 4 weeks after L-T4 withdra...

2005
SIMON J. K. LEE

Since final mitral valve (MV) closure and aortic ejection velocity are mediated by the same forces in early left ventricular (LV) contraction, the rate of final MV closure (BC slope) should reflect LV performance. We first verified whether peak final closing velocity (ds/dt) of the anterior MV leaflet (AMVL) is related to peak aortic ejection velocity (V) and LV dp/dt in 18 open-chest dogs. We ...

2004
P Schuster S Faerestrand O J Ohm

Objective: To quantify long term effects of cardiac resynchronisation therapy (CRT) by biventricular pacing in patients with heart failure (HF). Methods: Regional changes in left ventricular (LV) contraction patterns effected by CRT in 19 patients with HF (12 with ischaemia; mean (SD) age 66 (9) years) with bundle branch block were examined by colour Doppler tissue velocity imaging (c-TVI). Tim...

Journal: :European heart journal 2010
Ralph A H Stewart Andrew J Kerr Gillian A Whalley Malcolm E Legget Irene Zeng Michael J A Williams John Lainchbury Andrew Hamer Robert Doughty Mark A Richards Harvey D White

AIMS Left ventricular (LV) hypertrophy and abnormal non-invasive measures of LV diastolic function are common in patients with severe aortic stenosis (AS) but their prognostic importance is uncertain. This study aimed to determine whether tissue Doppler measures of LV systolic and/or diastolic function or echocardiographic LV hypertrophy are useful for risk stratifying asymptomatic patients wit...

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