Ralf J. Holzer

ORCID: 0000-0003-2915-3724
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • Congenital Heart Disease Studies
  • Cardiac Valve Diseases and Treatments
  • Cardiac Structural Anomalies and Repair
  • Cardiovascular Conditions and Treatments
  • Cardiovascular and Diving-Related Complications
  • Mechanical Circulatory Support Devices
  • Cardiac Arrhythmias and Treatments
  • Cardiac, Anesthesia and Surgical Outcomes
  • Ultrasound in Clinical Applications
  • Central Venous Catheters and Hemodialysis
  • Aortic Disease and Treatment Approaches
  • Healthcare Policy and Management
  • Pulmonary Hypertension Research and Treatments
  • Vascular anomalies and interventions
  • Coronary Artery Anomalies
  • Cardiovascular Function and Risk Factors
  • Radiation Dose and Imaging
  • Kawasaki Disease and Coronary Complications
  • Renal and Vascular Pathologies
  • Radiology practices and education
  • Infective Endocarditis Diagnosis and Management
  • Vascular Anomalies and Treatments
  • Cardiac Arrest and Resuscitation
  • Cardiac Imaging and Diagnostics
  • Cardiovascular Issues in Pregnancy

UC Davis Children's Hospital
2023-2025

University of California Davis Medical Center
2023-2025

University of California, Davis
2024

Weill Cornell Medicine
2017-2023

Presbyterian Hospital
2017-2023

Cornell University
2016-2023

NewYork–Presbyterian Hospital
2017-2023

New York Hospital Queens
2017-2023

Pediatrics and Genetics
2011-2021

Texas Health Dallas
2019

Objective: To report the immediate and midterm results of transcatheter closure perimembranous ventricular septal defect (PmVSD) using Amplatzer membranous VSD occluder (AMVSD). Methods: Between April 2002 August 2004, 100 patients underwent an attempt percutaneous device PmVSD AMVSD in 24 international centers. The median age was 9.0 years (0.7–58 years) weight 27.5 kg (7–121 kg). Results: A successfully deployed 93/100 (93%) patients. Reasons for procedural failure were increased gradient...

10.1002/ccd.20659 article EN Catheterization and Cardiovascular Interventions 2006-01-01

The objective of this study was to assess the immediate and mid-term results transcatheter closure postinfarct muscular ventricular septal defects (VSDs) using new Amplatzer VSD device (PIMVSD). Ventricular rupture occurs in 0.2% myocardial infarcts remains associated with very high morbidity mortality. Data were prospectively collected for 18 patients who underwent attempted postinfarction VSDs between 2000 2003. Five acute phase (within 6 days from infarct); remaining on day 14-95 after...

10.1002/ccd.10784 article EN Catheterization and Cardiovascular Interventions 2004-01-23

To describe case mix variation among institutions, and report adverse event rates in congenital cardiac catheterization by type.Reported for patients with heart disease undergoing vary considerably, due to non-comparable standards of data inclusion, highly variable mix.The Congenital Cardiac Catheterization Outcomes Project (C3PO) has been capturing characteristics events (AE) all catheterizations performed at six pediatric institutions. Validity completeness were independently...

10.1002/ccd.22266 article EN Catheterization and Cardiovascular Interventions 2009-09-24

Abstract Introduction: Since the 1980s, stent implantation has evolved as an important therapeutic strategy for coarctation of aorta. However, available data is frequently flawed by short follow‐up, lack adequate follow‐up imaging, and retrospective nature collection. Methods : Data was prospectively collected using a multicenter registry congenital cardiovascular interventional study consortium (CCISC). Between 2000 2009, 302 patients from 34 centers with median weight 58 kg underwent...

10.1002/ccd.22587 article EN Catheterization and Cardiovascular Interventions 2010-04-15

Background Percutaneous closure of patent ductus arteriosus ( PDA ) in term neonates is established, but data regarding outcomes infants born very preterm (<32 weeks gestation) are minimal, and no published criteria exist establishing a minimal weight 4 kg as suitable cutoff. We sought to analyze percutaneous occlusion referred for at weights <4 kg. Methods Results Retrospective analysis (January 2005–January 2014) was done single pediatric center. Procedural successes adverse events...

10.1161/jaha.115.002923 article EN cc-by-nc-nd Journal of the American Heart Association 2016-02-23

The Congenital Cardiac Catheterization Project on Outcomes (C3PO) was established to develop outcome assessment methods for pediatric catheterization.Six sites have been recording demographic, procedural and immediate data all cases, using a web-based system since February 2007. A sample of independently audited validity completeness. In 2006, participants categorized 84 procedure types into 6 categories by anticipated risk an adverse event (AE). Consensus empirical were used determine final...

10.1161/circinterventions.110.959262 article EN Circulation Cardiovascular Interventions 2011-03-09

The COVID-19 pandemic has had devastating direct consequences on the health of affected patients. It also a significant impact ability unaffected children to be physically active. We evaluated effect deconditioning from social distancing and school shutdowns implemented during cardiovascular fitness healthy children. This is single-center, retrospective case-control study performed in an urban tertiary referral center. A cohort 10 that underwent cardiopulmonary exercise testing after...

10.1007/s00246-020-02513-w article EN other-oa Pediatric Cardiology 2021-01-04

The technique and safety of transcatheter patent ductus arteriosus (PDA) closure have evolved during the past 20 years. We sought to report a multicenter experience PDA with focus on rate adverse events (AE) review institutional practice differences.Outcome data were collected at 8 centers prospectively using registry (Congenital Cardiac Catheterization Project Outcome Registry). Between February 2007 June 2010, 496 closures recorded device in 338 (68%) or coils 158 (32%). Most patients had...

10.1161/jaha.113.000424 article EN cc-by-nc-nd Journal of the American Heart Association 2013-11-18

Long-term outcome data of stent-implantation for coarctation the aorta are limited. We report up to 5 years postimplant follow-up in patients enrolled into COAST (Coarctation Aorta Stent Trial) and II trial (Covered Cheatham-Platinum Stents Prevention or Treatment Aortic Wall Injury Associated With Coarctation Aorta), evaluating bare Covered treatment associated aortic wall injury.Data was prospectively collected during 2 multi-center studies, enrolling 248 (COAST: n=121, II: n=127). Late...

10.1161/circinterventions.120.010308 article EN Circulation Cardiovascular Interventions 2021-05-27

BACKGROUND: Current metrics used to adjust for case mix complexity in congenital cardiac catheterization are becoming outdated due the introduction of novel procedures, innovative technologies, and expanding patient subgroups. This study aims develop a risk adjustment methodology introducing novel, clinically meaningful adverse event outcome incorporating modern understanding risk. METHODS: Data from diagnostic only interventional cases with defined types were collected patients ≤18 years...

10.1161/circinterventions.123.012834 article EN Circulation Cardiovascular Interventions 2024-01-23

The objective of the HASTA trial was to compare hand suture versus stapling loop ileostomy closure in a randomized controlled trial.Bowel obstruction is one main and clinically economically most relevant complication following after low anterior resection. best surgical technique for has not been defined yet.HASTA multicenter pragmatic with 2 parallel groups ileostomy. primary endpoint rate bowel within 30 days closure.A total 337 patients undergoing resection because rectal cancer 27...

10.1097/sla.0b013e318272df97 article EN Annals of Surgery 2012-10-23

Background— Pulmonary artery (PA) balloon angioplasty and/or stenting (PA rehabilitation) is one of the most common procedures performed in cardiac catheterization laboratory, but comprehensive and consistently reported data on procedure-related adverse events (AE) are scarce. Methods Results— Data were prospectively collected using a multicenter registry (Congenital Cardiac Catheterization Project Outcomes). All cases that included stent implantation proximal or lobar PA position included....

10.1161/circinterventions.110.961029 article EN Circulation Cardiovascular Interventions 2011-04-27

As US health care increasingly focuses on outcomes as a means for quantifying quality, there is growing demand risk models that can account the variability of patients treated at different hospitals so equitable comparisons between institutions be made. We sought to apply aspects prior risk-standardization methodology begin development tool National Cardiovascular Data Registry (NCDR) IMPACT (Improving Pediatric and Adult Congenital Treatment) Registry.Using IMPACT, we identified all...

10.1161/circulationaha.114.014694 article EN Circulation 2015-10-20

Objectives We report the Melody valve implanted and/or expanded to 24‐mm diameter. Background The Medtronic has been up 22 mm in pulmonary position for over a decade. Methods A retrospective chart review was performed on 82 patients who underwent implant. Technical implant method, pre‐ and postimplant echocardiographic findings, initial follow‐up were reviewed. Results Between 04/2008 12/2011, 13 valves successfully 11 patients, median age 35 years (range 16–61 years), (bioprosthetic valve,...

10.1002/ccd.24821 article EN Catheterization and Cardiovascular Interventions 2013-01-29
Coming Soon ...