RESULTS
Twenty-four procedures were performed in 12 patients (9 women, 3 men)
with CCh and ICD: 7 (58.3%) had LQTS, 4 (33.3%) had BrS and 1 (8.3%)
had CPVT. Ages ranged from 17 and 67, with a mean age of 42.5+ 14,
and 8 patients (66.6%) were white. All patients were in stable
condition, with no recent events before the dental care and receiving
antiarrhythmic drug treatment (if indicated) according to medical
decision (Table 1).
There were no symptoms or ICD therapy (antitachycardia pacing therapy
[ATP] and shocks triggered). No complications occurred during the
dental procedure requiring interruption. After administration of 2
cartridges of anesthetics, all patients did not complain of pain in both
sessions, that lasted from 32 to 93 minutes, with an average of
55+ 15 minutes.
Holter monitoring registered the HR and numbers of supraventricular and
ventricular premature beats per hour in both conditions (with and
without epinephrine) during the study periods, with no significant
difference between them (P>0.05) (Tables 2).
No LTE occurred during dental treatment, regardless of the type of
anesthesia. No patient with ICD received device shocks during the
procedures and no sustained arrhythmias were observed.
Patients with LQTS and ICD did not show any LTE and the QTc measurements
showed no statistically significant differences (Table 3). After
administration of anesthesia, changes in QTc (categorized in
>10% of shortening or lengthening of QTc) occurred in 2
patients, shortening this interval.
The four patients with BrS had no changes in ECG morphology in both
conditions, with and without epinephrine, during the studied 3 moments
and had no LTE.
The patient with CPVT did not showed occurrence and documentation of
ventricular arrhythmia in the electrocardiographic tracings.
At the recording time points, with and without epinephrine, there were
no significant differences in systolic and diastolic BP values and in
anxiety measures.