Fig. 1.The algorithm devised to distinguish sarcoidosis with left and
right ventricular involvement from ACM and its application to the ECG of our
patient who had CS mimicking ACM. (A) The ECG algorithm. (B) The application of
the algorithm on our patient’s ECG. The PR interval is 220–230 ms, thus already
the first step of the algorithm suggests CS. The surface area of the maximum R’
wave in lead V marked by light blue color was 1.65 mm,
therefore the third step of the algorithm also suggests CS. R’ wave was defined
as any positive deflection after an S wave. Reproduced with permission from [6].
ARVC, arrhythmogenic right ventricular cardiomyopathy; CS, cardiac sarcoidosis;
ECG, electrocardiogram; ACM, arrhythmogenic cardiomyopathy.