Publications by authors named "J Viik"
Article Synopsis
- Exercise electrocardiography (ECG) is important for diagnosing coronary artery disease (CAD), but its effectiveness in asymptomatic women requires further study; this research specifically analyzed ECG parameters in middle-aged women.
- The study included 108 asymptomatic women who completed exercise ECG tests multiple times, assessing false-positive rates of different ECG measures and their repeatability using statistical analyses.
- Results showed that a two-lead configuration reduced false-positive rates for certain ECG parameters, suggesting that ST/HR hysteresis and ST-segment recovery are more reliable indicators for diagnosing CAD than traditional methods.
Article Synopsis
- Dislocation is a common complication in total hip replacement (THR), and recent increases in dislocation rates at a specific institution were linked to reduced head coverage from a new neutral liner.
- The study aimed to compare articulating head coverage among 25 different modular neutral polyethylene liners used in THR to identify significant differences and create a new classification system.
- Results indicated that head coverage varied significantly between the liners (from 167.7° to 194.8°), leading to the conclusion that even neutral liners differ in coverage, prompting the proposal of a "hemispheric coverage index" for better distinction.
In an ageing society, the incidence of hard-to-heal wounds is rising. Chronic wound healing is a complex process, which requires specialised treatment. Clinical assessment of the wound is essential to establish care approaches but is usually based on visual evaluation and it remains challenging.
View Article and Find Full Text PDFPrediction of Sudden Cardiac Death With Ultra-Short-Term Heart Rate Fluctuations.
JACC Clin Electrophysiol
September 2024
Background: Conventional measures of heart rate variability (HRV) have shown only modest associations with sudden cardiac death (SCD). Detrended fluctuation analysis (DFA), with novel methodological developments to evaluate the short-term scaling exponent, is a potentially superior method compared to conventional HRV tools.
Objectives: In this study, the authors studied the analysis of the association between DFA and SCD.
Performance Evaluation of QT-RR Adaptation Time Lag Estimation in Exercise Stress Testing.
IEEE Trans Biomed Eng
November 2024
Background: Slower adaptation of the QT interval to sudden changes in heart rate has been identified as a risk marker of ventricular arrhythmia. The gradual changes observed in exercise stress testing facilitates the estimation of the QT-RR adaptation time lag.
Methods: The time lag estimation is based on the delay between the observed QT intervals and the QT intervals derived from the observed RR intervals using a memoryless transformation.