Publications by authors named "Zoltan Demjen"
Arrhythmic and hemodynamic complications related to ST-segment elevation myocardial infarction (STEMI) represent a major clinical challenge. Several scores have been developed to predict mortality in STEMI. However, those scores almost exclusively include factors related to the acute phase of STEMI, and no score has been evaluated to date for its ability to specifically predict arrhythmic and hemodynamic complications.
View Article and Find Full Text PDFBackground And Aims: Machine learning (ML) models have been proposed as a prognostic clinical tool and superiority over clinical risk scores is yet to be established. Our aim was to analyse the performance of predicting 3-year all-cause- and cardiovascular cause mortality using ML techniques and compare it with clinical scores in a percutaneous coronary intervention (PCI) population.
Methods: An all-comers patient population treated by PCI in a tertiary cardiovascular centre that have been included prospectively in the local registry between January 2016-December 2017 was analysed.
Article Synopsis
- Renal dysfunction is linked to lower positive coronary fractional flow reserve (FFR) values, likely due to associated microvascular issues, and its impact may vary with arterial hypertension severity.
- *In a study of 109 patients with coronary artery lesions, those with renal dysfunction had a significantly lower incidence of positive FFR results, especially among severely hypertensive patients (39.7% vs. 60.8%).
- *The findings suggest that renal dysfunction increases negative FFR results only in severe hypertension cases and emphasize the need for larger studies to confirm these results.
Atrial fibrillation (AF) often complicates ST-segment elevation myocardial infarction (STEMI). Predictors of AF in this setting include factors related to the acute phase of STEMI and pre-existing conditions. More recently, novel AF predictors have been identified in the general population.
View Article and Find Full Text PDFBackground: Patients with chronic obstructive pulmonary disease (COPD) presenting with ST-segment elevation myocardial infarction (STEMI) are less likely to beneficiate of primary percutaneous coronary intervention (pPCI), and have poorer prognosis. We aimed to evaluate the impact of COPD on the in-hospital outcomes of pPCI-treated STEMI patients.
Methods: Data were collected from 418 STEMI patients treated by pPCI.
Objective: The predictive value of five risk score models containing clinical (PAMI-PMS, GRACE-GRS, and modified ACEF-ACEFm-scores), angiographic SYNTAX score (SXS) and combined Clinical SYNTAX score (CSS) variables were evaluated for the incidence of three procedural complications of primary percutaneous coronary intervention (pPCI): iatrogenic coronary artery dissection, angiographically visible distal embolization and angiographic no-reflow phenomenon.
Methods: The mentioned scores and the incidence of procedural complications were retrospectively analyzed in 399 consecutive patients with acute ST-elevation myocardial infarction who underwent pPCI.
Results: Coronary dissection, distal embolization and no-reflow occurred in 39 (9.