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Biomechanical modeling combined with pressure-volume loop analysis to aid surgical planning in patients with complex congenital heart disease.
Med Image Anal
December 2024
Division of Pediatric Cardiology, Department of Pediatrics, UT Southwestern Medical Center, Dallas, TX, USA. Electronic address:
Patients with congenitally corrected transposition of the great arteries (ccTGA) can be treated with a double switch operation (DSO) to restore the normal anatomical connection of the left ventricle (LV) to the systemic circulation and the right ventricle (RV) to the pulmonary circulation. The subpulmonary LV progressively deconditions over time due to its connection to the low pressure pulmonary circulation and needs to be retrained using a surgical pulmonary artery band (PAB) for 6-12 months prior to the DSO. The subsequent clinical follow-up, consisting of invasive cardiac pressure and non-invasive imaging data, evaluates LV preparedness for the DSO.
View Article and Find Full Text PDFIncreases in Donor/Recipient Predicted Heart Mass Ratios Do Not Result in Large Donor Right Ventricles.
J Heart Lung Transplant
December 2024
Oregon Health Science University, Knight Cardiovascular Institute. Electronic address:
Pulmonary hypertension puts strain on the right ventricle (RV), leading to the widespread practice of oversizing donor hearts to mitigate complications. However, contemporary evidence for this practice is neutral. We studied the relationship between donor-recipient predicted heart mass (D/R PHM) ratios and increases in donor left ventricle (LV) and right ventricle (RV) mass.
View Article and Find Full Text PDFIntroduction: Dilated cardiomyopathy (DCM) is a leading cause of heart failure (HF) characterized by left ventricular dilatation and systolic dysfunction not explained by abnormal loading conditions. Despite its prevalence, DCM's epidemiology and prognosis remain poorly studied in our country.
Material And Methods: A retrospective observational study encompassed patients discharged from all Spanish public hospitals between 2016 and 2021 diagnosed with DCM.
Effect of respiration and exercise on seismocardiographic signals.
Comput Biol Med
December 2024
Department of Mechanical and Aerospace Engineering, University of Central Florida, and the Biomedical Acoustics Research Company, 32816, Orlando, FL, USA.
Background: Seismocardiographic signals (SCG) are chest wall vibrations induced by mechanical cardiac activities. This study investigated the morphological changes in the SCG signal due to respiration and exercise.
Methods: Fifteen healthy subjects were recruited, and SCG was acquired before and after exercise.
Left ventricular wall thickness discrepancies at end-diastole and mid-diastole: Reference values for cardiac CT.
Clin Imaging
December 2024
Department of Radiology, Mianyang Central Hospital, School of Medicine, University of Electronic Science and Technology of China, No. 12 Changjia Lane, Alarm Bell St, Fucheng District, Mianyang 621000, China. Electronic address:
Purpose: To investigate differences in left ventricular wall thickness (LVWT) measurements between end-diastole and mid-diastole using cardiac computed tomography (CCT) and establish LVWT reference values stratified by phase, sex, and region.
Methods: Subjects who underwent CCT without a history of cardiovascular disease or risk factors were retrospectively included between 2021 and 2024. LVWT was manually measured in each segment according to the American Heart Association's 17-segment model at end-diastole and mid-diastole.
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