Circulation Cardiovascular Imaging

Publisher: American Heart Association, American Heart Association

Current impact factor: 5.32

Impact Factor Rankings

2016 Impact Factor Available summer 2017
2014 / 2015 Impact Factor 5.316
2013 Impact Factor 6.752
2012 Impact Factor 5.795
2011 Impact Factor 5.941
2010 Impact Factor 4.757
2009 Impact Factor 1.783

Impact factor over time

Impact factor
Year

Additional details

5-year impact 6.00
Cited half-life 3.30
Immediacy index 1.37
Eigenfactor 0.02
Article influence 2.63
Other titles Circulation / Cardiovascular imaging., Cardiovascular imaging
ISSN 1942-0080
OCLC 316253218
Material type Periodical, Internet resource
Document type Internet Resource, Journal / Magazine / Newspaper

Publisher details

American Heart Association

  • Pre-print
    • Archiving status unclear
  • Post-print
    • Author cannot archive a post-print version
  • Restrictions
    • If required by funding agency or institutional policy
    • 6 months embargo
  • Conditions
    • On Institutional repository or funding agency repository
    • On a non-profit server
    • Publisher's version/PDF cannot be used
    • Publisher will automatically deposit authors post-print in PubMed Central for NIH funded authors after 12 months
    • Publisher will automatically deposit authors post-print in PubMed Central for HHMI and Wellcome Trust funded authors after 6 months
    • Authors may place a 'toll-free' link to teir article on authors' personal website or institutional website without embargo
    • Publisher last contacted on 11/07/2014
  • Classification
    white

Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: Eletter: Circumferential Strain: The Deja vu in Aortic Stenosis aitzaz_rai@hotmail.com">Aitzaz BS Rai Farrukh Munir, Ehtesham ul Haq, Ahmed Waqas, Sara Bughio, Anum Faisal Khan Green Templeton College, UNIVERSITY of Oxford We read the article with interest1. It is an important contribution to the field. However, we would like to SUGGEST two things. 1) Aortic stenosis causes concentric hypertrophy or sometimes eccentric hypertrophy depending upon flow vortices direction and ventricular anatomy2. In such a situation the concentric muscle fibres would also be involved in addition to longitudinal muscle fibres. In addition to global longitudinal strain (GLS), circumferential strain and possibly radial strain may have predictive value. Though we acknowledge that radial strain has less reproducibility and robustness. 2) Myocardial twist and torsion would also be useful indices to look for. 3) Circumferential strain affects endothelial shear stress and nitric oxide synthase and several other pathways3. 4) GLS does not affect the entire electrical phenomenon and cardiac electrical, mechanical and metabolic remodelling, energetic changes i.e. PCR/ATP ratio, Vascular territories on invasive imaging involve full myocardial thickness. Nevertheless, it's an important contribution to science of aortic stenosis. References: 1. Dahou A, Bartko PE, Capoulade R, Clavel MA, Mundigler G, Grondin SL, Bergler-Klein J, Burwash I, Dumesnil JG, Senechal M, O'Connor K, Baumgartner H, Pibarot P. Usefulness of global left ventricular longitudinal strain for risk stratification in low ejection fraction, low-gradient aortic stenosis: results from the multicenter true or pseudo-severe aortic stenosis study. Circ Cardiovasc Imaging. 2015;8:e002117. 2. Devereux RB, Alonso DR, Lutas EM, Gottlieb GJ, Campo E, Sachs I, Reichek N. Echocardiographic assessment of left ventricular hypertrophy: comparison to necropsy findings. Am J Cardiol. 1986;57:450-8. 3. Qiu Y, Tarbell JM. Interaction between wall shear stress and circumferential strain affects endothelial cell biochemical production. J Vasc Res. 2000;37:147-57. Conflict of Interest:
    No preview · Article · Apr 2016 · Circulation Cardiovascular Imaging
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    Preview · Article · Dec 2015 · Circulation Cardiovascular Imaging

  • No preview · Article · Dec 2015 · Circulation Cardiovascular Imaging
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    ABSTRACT: Background - Cardiac 123I-metaiodobenzylguanidine (123I-mIBG) imaging improves prognostication in patients with left ventricular (LV) dysfunction. Whether 123I-mIBG can identify optimal candidates for implantable cardiac defibrillator (ICD) placement is unclear. We examined whether 123I-mIBG enhances risk assessment and identifies patients with enhanced survival with ICD in a patient cohort with reduced LV function who were candidates for ICD implantation. Methods and Results - We identified 777 patients (66 sites, 12 countries) without ICD at the time of enrollment in Adreview Myocardial Imaging for Risk Evaluation in Heart Failure (ADMIRE-HF) and index 123I-mIBG study. Patients completed prescribed study protocol and follow-up. Heart-to-mediastinum (H/M) ratio was determined from 123I-mIBG results. Survival modeling used a Cox proportional hazards mixed-effects model, including a propensity score, to adjust for nonrandomized ICD implantation after 123I-mIBG. All-cause death occurred in 75 patients (9.6%), and 196 (25%) patients had ICD implantation on follow-up. After adjusting for multiple factors, although the H/M ratio added incremental prognostic value and enhanced reclassification, neither H/M results, BNP levels, nor left ventricular ejection fraction interacted with ICD use in the survival model, indicating that these variables did not identify patients with enhanced survival with ICD implantation. Nonetheless, H/M results did identify the number of lives saved by ICD use per 100 treated. Conclusions - We found that although 123I-mIBG imaging enhances the risk stratification of patients with left ventricular dysfunction who are ICD candidates, it does not identify which patients may have improved survival with ICD placement. However, 123I-mIBG identifies the absolute benefit gained with ICD use, thus may play a role in optimizing the cost-effectiveness of this intervention.
    No preview · Article · Dec 2015 · Circulation Cardiovascular Imaging

  • No preview · Article · Dec 2015 · Circulation Cardiovascular Imaging
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    ABSTRACT: Background: Contemporary understanding of exercise-induced cardiac remodeling is based on cross-sectional data and relatively short duration longitudinal studies. Temporal progression of exercise-induced cardiac remodeling remains incompletely understood. Methods and results: A longitudinal repeated-measures study design using 2-dimensional and speckle-tracking echocardiography was used to examine acute augmentation phase (AAP; 90 days) and more extended chronic maintenance phase (39 months) left ventricular (LV) structural and functional adaptations to endurance exercise training among competitive male rowers (n=12; age 18.6±0.5 years). LV mass was within normal limits at baseline (93±9 g/m(2)), increased after AAP (105±7 g/m(2); P=0.001), and further increased after chronic maintenance phase (113±10 g/m(2); P<0.001 for comparison to post-AAP). AAP LV hypertrophy was driven by LV dilation (ΔLV end-diastolic volume, 9±3 mL/m(2); P=0.004) with stable LV wall thickness (ΔLV wall thickness, 0.3±0.1 mm; P=0.63). In contrast, chronic maintenance phase LV hypertrophy was attributable to LV wall thickening (Δ LV wall thickness, 1.1±0.4 mm; P=0.004) with stable LV chamber volumes (ΔLV end-diastolic volume, 1±1 mL/m(2); P=0.48). Early diastolic peak tissue velocity increased during AAP (-11.7±1.9 versus -13.6±1.3 cm/s; P<0.001) and remained similarly increased after chronic maintenance phase. Conclusions: In a small sample of competitive endurance athletes, exercise-induced cardiac remodeling follows a phasic response with increases in LV chamber size, early diastolic function, and systolic twist in an acute augmentation phase of exercise training. This is followed by a chronic phase of adaptation characterized by increasing wall thickness and regression in LV twist. Training duration is a determinant of exercise-induced cardiac remodeling and has implications for the assessment of myocardial structure and function in athletes.
    No preview · Article · Dec 2015 · Circulation Cardiovascular Imaging
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    ABSTRACT: Background: To develop a technique to noninvasively estimate stroke volume in real time during magnetic resonance imaging (MRI)-guided procedures, based on induced magnetohydrodynamic voltages (VMHD) that occur in ECG recordings during MRI exams, leaving the MRI scanner free to perform other imaging tasks. Because of the relationship between blood flow (BF) and VMHD, we hypothesized that a method to obtain stroke volume could be derived from extracted VMHD vectors in the vectorcardiogram (VCG) frame of reference (VMHDVCG). Methods and results: To estimate a subject-specific BF-VMHD model, VMHDVCG was acquired during a 20-s breath-hold and calibrated versus aortic BF measured using phase-contrast magnetic resonance in 10 subjects (n=10) and 1 subject diagnosed with premature ventricular contractions. Beat-to-beat validation of VMHDVCG-derived BF was performed using real-time phase-contrast imaging in 7 healthy subjects (n=7) during 15-minute cardiac exercise stress tests and 30 minutes after stress relaxation in 3T MRIs. Subject-specific equations were derived to correlate VMHDVCG with BF at rest and validated using real-time phase-contrast. An average error of 7.22% and 3.69% in stroke volume estimation, respectively, was found during peak stress and after complete relaxation. Measured beat-to-beat BF time history derived from real-time phase-contrast and VMHD was highly correlated using a Spearman rank correlation coefficient during stress tests (0.89) and after stress relaxation (0.86). Conclusions: Accurate beat-to-beat stroke volume and BF were estimated using VMHDVCG extracted from intra-MRI 12-lead ECGs, providing a means to enhance patient monitoring during MR imaging and MR-guided interventions.
    No preview · Article · Dec 2015 · Circulation Cardiovascular Imaging
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    ABSTRACT: Background: In sepsis, whether the assessment of left ventricular global longitudinal systolic strain (GLS) is feasible and prognostically relevant remains controversial. Methods and results: Consecutive patients admitted to a high-dependency observational unit with sepsis or septic shock were evaluated. Left ventricular ejection fraction (EF) by planimetry and peak GLS by 2D speckle tracking were available at admission in 115 of 149 (77%) patients. Compared with patients included in the study, those excluded (n=34, 23%) showed higher proportion of chronic obstructive pulmonary disease (P<0.01), but with comparable clinical characteristics and mortality rates. GLS showed lowest variability for low EF and highest for higher EF. By day-28 follow-up, all-cause mortality was 30% (n=34 and n=19 within 7 days from hospitalization). GLS and EF were both more abnormal in deceased than in those alive by day-28 follow-up (both P<0.05, findings consistent using day-7 follow-up data). GLS showed a borderline relationship with mortality by day-28 follow-up (hazard ratio 1.16/%, P=0.05), whereas EF did not (hazard ratio 0.99/%, P=0.63) accounting for age; the lack of association of all-cause mortality with EF was consistent at day-7 follow-up (hazard ratio 0.94/%, P=0.9), whereas more abnormal GLS correlated significantly with higher mortality rate (hazard ratio 1.30/%, P=0.03) independent to age. Conclusions: In patients with sepsis assisted in a high-dependency observational unit, feasibility of assessments of left ventricular EF and GLS within 24 h from the hospitalization was acceptable and EF showed no prognostic relevance, whereas GLS showed a correlation with mortality rate potentially relevant in shorter more than in longer follow-ups.
    No preview · Article · Nov 2015 · Circulation Cardiovascular Imaging
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    ABSTRACT: Echocardiography and fluoroscopy are the main techniques for prosthetic heart valve (PHV) evaluation, but because of specific limitations they may not identify the morphological substrate or the extent of PHV pathology. Cardiac computed tomography (CT) and magnetic resonance imaging (MRI) have emerged as new potential imaging modalities for valve prostheses. We present an overview of the possibilities and pitfalls of CT and MRI for PHV assessment based on a systematic literature review of all experimental and patient studies. For this, a comprehensive systematic search was performed in PubMed and Embase on March 24, 2015, containing CT/MRI and PHV synonyms. Our final selection yielded 82 articles on surgical valves. CT allowed adequate assessment of most modern PHVs and complemented echocardiography in detecting the obstruction cause (pannus or thrombus), bioprosthesis calcifications, and endocarditis extent (valve dehiscence and pseudoaneurysms). No clear advantage over echocardiography was found for the detection of vegetations or periprosthetic regurgitation. Whereas MRI metal artifacts may preclude direct prosthesis analysis, MRI provided information on PHV-related flow patterns and velocities. MRI demonstrated abnormal asymmetrical flow patterns in PHV obstruction and allowed prosthetic regurgitation assessment. Hence, CT shows great clinical relevance as a complementary imaging tool for the diagnostic work-up of patients with suspected PHV obstruction and endocarditis. MRI shows potential for functional PHV assessment although more studies are required to provide diagnostic reference values to allow discrimination of normal from pathological conditions.
    No preview · Article · Sep 2015 · Circulation Cardiovascular Imaging

  • No preview · Article · Sep 2015 · Circulation Cardiovascular Imaging

  • No preview · Article · Sep 2015 · Circulation Cardiovascular Imaging