public static List<PointF> ECG_Pacemaker (Patient _P, Lead _L) {
     return Plotting.Concatenate (new List<PointF> (),
         Plotting.Multiply (Plotting.Convert (Dictionary.ECG_Pacemaker),
         baseLeadCoeff [(int)_L.Value, (int)WavePart.QRST]));
 }