Patients will undergo the medical procedure prescribed for them, using local anesthesia with or without adrenaline, at the discretion of the surgeon, in accordance with the usual routine being applied nowadays. The amount and type of anesthesia used will be registered. In addition to the routine monitoring that is currently performed (blood pressure cuff and non-invasive blood oxygen saturation) a continuous ECG monitoring device will be connected prior to the beginning of the surgical procedure, until the patient is discharged from the recovery room. The ECG monitoring results will be analyzed to detect arrhythmia. Side effects being reported by patients (palpitations, dizziness, fainting, CPR {cardiopulmonary resuscitation} ) will be recorded. In cases that an arrhythmia is detected, the type of arrhythmia and the presence of clinical symptoms will be investigated.