James B. Seward
Mayo Clinic
Internal medicineRadiologySurgeryDoppler effectCardiologyHemodynamicsCardiac catheterizationMitral valveHeart failureVentricleAtrial fibrillationHeart diseaseRegurgitation (circulation)Doppler echocardiographyMitral regurgitationIn patientMyocardial infarctionDiastoleMedicineEjection fraction
Publications 580
#1Rowlens M. Melduni (Mayo Clinic)H-Index: 11
#2Joseph F. Malouf (Mayo Clinic)H-Index: 26
Last. Naser M. Ammash (Mayo Clinic)H-Index: 35
view all 13 authors...
Background Direct-current cardioversion (DCCV) of atrial fibrillation and atrial flutter commonly causes post-DCCV left atrial (LA) stunning (LAS), which may potentiate thromboembolic complications. Data on LAS determinants are inconclusive. Methods We prospectively evaluated LA and LA appendage function before and immediately after DCCV of atrial fibrillation and atrial flutter in 59 consecutive patients undergoing transesophageal echocardiographically guided DCCV to determine predictors of pos...
7 CitationsSource
#1Saeed A.L. Ahmari (Mayo Clinic)H-Index: 3
#2T. Jared Bunch (Mayo Clinic)H-Index: 58
Last. Krishnaswamy Chandrasekaran (Mayo Clinic)H-Index: 35
view all 8 authors...
Traditional cardiovascular risk factors have been shown to cause microvascular dysfunction. Most studies that have evaluated microcirculation rely on invasive measurement tools. We used dobutamine stress echocardiography, a validated method to measure coronary flow velocity (CFV) and coronary flow reserve (CFR), in a previously unstudied population without known significant coronary artery disease to determine the impact of traditional risk factors on CFR. Consecutive patients who had no evidenc...
20 CitationsSource
#1Walter P. Abhayaratna (Mayo Clinic)H-Index: 15
#2Kaniz Fatema (Mayo Clinic)H-Index: 11
Last. Teresa S.M. Tsang (Mayo Clinic)H-Index: 56
view all 8 authors...
The aim of this prospective study was to evaluate the incremental value of left atrial (LA) function for the prediction of risk for first atrial fibrillation (AF) or atrial flutter. Maximum and minimum LA volumes were quantitated by echocardiography in 574 adults (mean age 74 ± 6 years, 52% men) without a history or evidence of atrial arrhythmia. During a mean follow-up period of 1.9 ± 1.2 years, 30 subjects (5.2%) developed electrocardiographically confirmed AF or atrial flutter. Subjects with ...
238 CitationsSource
#1Ahmed A. Alsaileek (Mayo Clinic)H-Index: 5
#1Ahmed Alsaileek (Mayo Clinic)H-Index: 3
Last. Paul R. Julsrud (Mayo Clinic)H-Index: 37
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This report describes a 24-year-old female with left ventricular noncompaction. Cardiovascular magnetic resonance (CMR) imaging demonstrated the characteristic features of noncompaction. We were also able to noninvasively document the presence and extent of myocardial fibrosis depicted on myocardial delayed enhancement (MDE). Magnetic resonance imaging can be performed simply and give much information about the morphologic and tissue characteristics of left ventricular wall in noncompaction. In ...
22 CitationsSource
#1Steven J. Lester (Mayo Clinic)H-Index: 29
#2A. Jamil Tajik (Mayo Clinic)H-Index: 141
Last. James B. Seward (Mayo Clinic)H-Index: 137
view all 6 authors...
It has now been a quarter of a century since the first description by Kitabatake and his associates of the use of echo-Doppler to characterize the transmitral flow velocity curves in various disease states. A decade ago we described the role of echocardiography in the “Evaluation of Diastolic Filling of Left Ventricle in Health and Disease: Doppler Echocardiography Is the Clinician’s Rosetta Stone.” Over the ensuing decade, advances in echo-Doppler have helped to further decipher the morphologic...
471 CitationsSource
#1Martin Osranek (Mayo Clinic)H-Index: 8
#2John H. EisenachH-Index: 33
Last. Marek BelohlavekH-Index: 42
view all 6 authors...
Patients with hypertension exhibit impaired energetic coupling between the ventricle and the arterial system, leading to reduced cardiac mechanic efficiency and exercise capacity. We tested whether blood pressure normalization with current antihypertensive therapy can improve arterioventricular coupling. Eighteen hypertensive patients without other cardiovascular disease were examined before and after antihypertensive therapy. Transthoracic echocardiography was performed. Central aortic pressure...
21 CitationsSource
#1James B. SewardH-Index: 137
Last. Teresa S.M. TsangH-Index: 1
view all 5 authors...
#1Partho P. Sengupta (Mayo Clinic)H-Index: 58
#2Vijay K. Krishnamoorthy (Mayo Clinic)H-Index: 6
Last. Bijoy K. Khandheria (Mayo Clinic)H-Index: 71
view all 11 authors...
Objectives The purpose of this study was to compare the longitudinal, circumferential, and radial mechanics of the left ventricle (LV) in patients with constrictive pericarditis (CP) and restrictive cardiomyopathy (RCM). Background Diastolic dysfunction in CP is related to epicardial tethering and pericardial constraint, whereas in RCM it is predominantly characterized by subendocardial dysfunction. Assessment of variations in longitudinal and circumferential deformation of LV might be useful to...
144 CitationsSource
#1Douglas L. PackerH-Index: 26
Last. Richard A. RobbH-Index: 61
view all 5 authors...
8 CitationsSource
#1Fuminobu Ishikura (Osaka University)H-Index: 21
#2Shintaro Beppu (Osaka University)H-Index: 27
Last. Bijoy K. Khandheria (Mayo Clinic)H-Index: 71
view all 5 authors...
BACKGROUND: Sildenafil citrate (Viagra) is a selective inhibitor of cyclic guanosine monophosphate (cGMP)-specific phosphodiesterase type 5, which might enhance the vasorelaxant and natriuretic actions of atrial natriuretic peptide (ANP) in patients with heart failure. The objective of this study was to examine the combined effect of Viagra on hemodynamic changes during infusion of exogenous ANP. METHODS AND RESULTS: Healthy male beagles were used to assess systemic blood pressure, pulmonary art...
3 CitationsSource