Aijaz A. Shah
Mayo Clinic
Subclinical infectionInternal medicinePathologyUltrasoundStrain rateChronotropicCardiologyHemodynamicsBasal (phylogenetics)Hazard ratioCardiac imagingLeft bundle branch blockHeart rateStrain rate imagingReference rangeHeart failureVentricleDiastolic functionPulmonary hypertensionDobutamineStress EchocardiographyReference valuesVelocity vectorLongitudinal strainIn patientDobutamine stress echocardiographyImaging techniqueConfidence intervalMyocardial infarctionProportional hazards modelDiastoleStrain (chemistry)MedicineEjection fractionBlood pressure
Publications 5
OBJECTIVE: To evaluate whether global peak systolic strain (PSS) and peak systolic strain rate (PSSR) derived from velocity vector imaging (VVI) allow early recognition of regional and global right ventricular (RV) dysfunction and the impact of this on left ventricular (LV) function in patients with pulmonary hypertension (PHT). BACKGROUND: RV function is an important determinant of prognosis in patients with heart failure, pulmonary hypertension, heart transplant, and congenital heart diseases....
2 CitationsSource
#1Nowell M. Fine (Mayo Clinic)H-Index: 22
#2Aijaz A. Shah (Mayo Clinic)H-Index: 2
Last. Hector R. Villarraga (Mayo Clinic)H-Index: 26
view all 11 authors...
Velocity vector imaging (VVI) software permits quantitative assessment of ventricular function through measurement of myocardial strain (S) and strain rate (SR). The purpose of this study was to define a reference range of ventricular S and SR values in normal adults using VVI software, and to describe the variability among observers and systems. Two-dimensional echocardiography was performed in 186 healthy adults free of cardiovascular disease or risk factors, followed by comprehensive ventricu...
70 CitationsSource
#1Ying Shan (Mayo Clinic)H-Index: 2
#2Hector R. Villarraga (Mayo Clinic)H-Index: 26
Last. Patricia A. Pellikka (Mayo Clinic)H-Index: 101
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Background Abnormal septal motion in left bundle branch block (LBBB) may compromise the interpretation of regional wall motion. Velocity vector imaging (VVI) has been proposed as an objective method to quantify regional myocardial deformation. The aim of this study was to determine whether VVI during dobutamine stress echocardiography (DSE) has prognostic value in patients with LBBB. Methods In 84 patients with (mean age, 75 ± 9 years) undergoing DSE, longitudinal peak systolic strain (e sys ) a...
12 CitationsSource
#1Hong MengH-Index: 2
view all 7 authors...
#1Aijaz A. Shah (Mayo Clinic)H-Index: 2
#2Robert B. McCully (Mayo Clinic)H-Index: 34
Last. Hector R. Villarraga (Mayo Clinic)H-Index: 26
view all 5 authors...
Objective: Strain (S) and Strain Rate (SR) are new techniques for assessment of systolic function of Left Ventricle (LV). Speckle tracking has been used to assess the segmental S and SR of the LV. Global LV systolic S and SR may be helpful to assess patients with Ischemic Heart Disease (IHD) and Cardiomyopathies. Our objective was to assess the change in global longitudinal and circumferential S and SR during Dobutamine Stress Echocardiography (DSE) in patients who had normal stress echocardiogr...