Obstructive Sleep Apnea as a Predictor of Abnormal Heart Rate Turbulence.

Obstructive sleep apnea (OSA) causes dysfunction of the autonomic nervous system, but the exact mechanism has not been fully understood. The aim of this study was to analyse the relationship between the incidence and severity of OSA and heart rate turbulence (HRT). Seventy one patients with clinical suspicion of OSA were qualified to participate in the study.

Obstructive sleep apnea as a predictor of reduced heart rate variability.

Purpose: This study aimed to analyze the relationship between the occurrence of obstructive sleep apnea (OSA) and heart rate variability (HRV) in a group of patients with clinical suggestion of OSA.

Methods: 104 patients with clinical suspicion of OSA were qualified to participate in the study (age: 53.15 ± 13.

Plasma YKL-40 levels correlate with the severity of coronary atherosclerosis assessed with the SYNTAX score.

Introduction YKL‑40 is a protein released locally by inflammatory cells. Thus, it may constitute a biomarker of inflammatory conditions, such as atherosclerosis. Objectives The aim of the study was to determine YKL‑40 levels in patients with ischemic heart disease and to analyze the correlation of this biomarker with the severity of coronary atherosclerosis.