Publications by authors named "H E HEYER"
Background: Although the use of rotational atherectomy (RA) is off-label in the setting of ST-elevation myocardial infarction (STEMI), it can be the only option in severely calcified culprit lesions to achieve procedural success. We sought to investigate the safety and feasibility of RA during primary percutaneous coronary intervention (PPCI).
Methods: This was a retrospective observational study of patients who underwent RA during PPCI from 12 European centres.
Article Synopsis
- The study examines the prognostic significance of quantitative flow ratio (QFR) measured after successful coronary artery recanalization in predicting target-vessel failure (TVF) compared to the target-vessel SYNTAX score (tvSS).
- Out of 470 chronic total occlusion (CTO) lesions, 324 could be analyzed, revealing that lower post-procedure QFR was associated with a trend toward higher TVF rates, yet it did not significantly predict outcomes.
- In contrast, the pre-procedural tvSS was identified as a significant independent predictor for 2-year TVF, suggesting its importance over immediate QFR assessment for long-term prognosis.
Background: With the established use of crossover stenting technique in bifurcation coronary artery lesions, added clinical benefit of final kissing of the side branch remains debatable. We report a case of a stenosis and thrombus formation of an ostial side branch after crossover stenting. A 38-year-old man was admitted with acute coronary syndrome complicated by acute pulmonary oedema.
View Article and Find Full Text PDFPurpose: Coronary catheterization after transcatheter aortic valve implantation (TAVR) may be challenging. The main objective of the study is to assess the feasibility of coronary catheterization and angioplasty according to each type of valve.
Patients And Method: We retrospectively studied coronary angiography or percutaneous angioplasty procedures after TAVR in two different centers.
The aim of the present work was to investigate the 'fine granular area' (FGA) formation based on artificially generated internal defects in additively manufactured Ti6Al4V specimens in the early stage of fatigue crack growth in the 'very high cycle fatigue' (VHCF) regime. Fatigue tests were performed with constant amplitude at pure tension-compression loading ( = -1) using an ultrasonic fatigue testing setup. Failed specimens were investigated using optical microscopy, high-resolution 'scanning electron microscopy' (SEM), and 'focused ion beam' (FIB) techniques.
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