With no explanation, label text_A→text_B with either "NOT ENOUGH INFO", "REFUTES" or "SUPPORTS".
text_A: The c deflection is known by the bulging of tricuspid into the right atrium during isovolumetric systole .
text_B: The upward deflections are the `` a '' ( atrial contraction ) , `` c '' ( ventricular contraction and resulting bulging of tricuspid into the right atrium during isovolumetric systole ) and `` v '' = atrial venous filling . *
SUPPORTS.