TY - RPRT TI - Power spectral and Poincaré plot characteristics in sinus node dysfunction. AU - Lennart Bergfeldt AU - Yoshiyuki Haga PY - 2003 DO - 10.1152/japplphysiol.01037.2002 UR - https://pubmed.ncbi.nlm.nih.gov/12576413/ ID - 12576413 ER -