Fig. 1
From: A novel ECG-biomarker for cardiac arrest during hypothermia
a We have found four potential biomarkers that correlate with risk for cardiac arrest in hypothermic rabbit hearts, calculated from QRS interval relative to Bazett’s (QTc) and Fredericia’s (QTf) correction of QT-interval. QRS/QTf is the most promising experimental biomarker. b QRS/QTc data from the included studies plotted against QRS/QTc and VF threshold values from rabbit. Human data showed high correlation (comparing 37 °C, 28–32 °C and < 24 °C) with both rabbit QRS/QTc (correlation coefficient: 0.97) and rabbit VF threshold (correlation coefficient: 1.00). Human values are given as mean (weighted for number of patients in each study) ± SD between study means weighted for number of patients in each study