Figure 1.
Schematic illustration of Tend-P and Tend-Q measurements.
ECG-intervals of interest (Tend-P, Tend-Q) reflecting the mechanical diastole were both manually measured and calculated as: RR minus PQ minus QT for Tend-P and RR minus QT for Tend-Q.
Figure 2.
Patient flow chart.
Figure 3.
Bland – Altman Diagram for the correlation between manually measured and calculated Tend - P interval (ms).
Manually measured diastolic intervals correlated perfectly with the calculated ones.
Figure 4.
Receiver Operating Curve (ROC) analysis.
ROC analysis showing diagnostic performance indices of echocardiographic parameters (LA-ESVI, septal E/e’) in combination with the electrocardiographic index Tend - P / (PQ x Age) in the validation group. See text and tables for values.