Just like 50 Cent! Lisa had to have her heart monitored for 24 hours, so she wore this battery packed monitor system attached to her body. She has what they call SVT. This was due to her having an abnormal heart rhythm.
Supraventricular tachycardia (SVT) is any tachycardic rhythm originating above the ventricular tissue. Paroxysmal supraventricular tachycardia (PSVT) is a rapid rhythm of the heart which involves an accessory pathway. This is in contrast to the potentially deadlier ventricular tachycardias, which are rapid rhythms that originate within the ventricular tissue or atrioventricular (AV) node.