Use of the biochip microarray system in detection of myocardial injury caused by radiofrequency catheter ablation.
BACKGROUND
In a prospective study, we measured plasma markers of myocardial damage induced by radiofrequency catheter ablation (RFA) with the protein biochip microarray system.


METHODS
A total of 32 consecutive patients undergoing RFA for atrioventricular nodal re-entry tachycardia (AVNRT), right atrial flutter (AFL) and atrial fibrillation (AF) were included in the study. Cardiac troponin I (cTnI), creatine kinase isoenzyme MB (CK-MB), heart-type fatty acid binding protein (hFABP) and glycogen phosphorylase BB (GPBB) were measured using biochip array technology at baseline and 24 h after the procedure.


RESULTS
Values for all markers increased 24 h after RFA (cTnI: 0.92+/-0.49 microg/L vs. 0.33+/-0.06 microg/L, p<0.001; CK-MB: 3.79+/-2.04 microg/L vs. 1.85+/-0.55 microg/L, p<0.001; hFABP: 2.82+/-0.95 microg/L vs. 2.00+/-0.95 microg/L, p<0.001; GPBB: 9.07+/-5.83 microg/L vs. 4.70+/-2.50 microg/L, p<0.001). The correlations between plasma marker levels and RFA time were cTnI: r=0.63, p<0.01; CK-MB: r=0.75, p<0.01; hFABP: r=0.55, p<0.05, GPBB: r=0.51, p<0.05; the correlation between RFA time and number of RF applications was significant (r=0.81, p<0.001). Patients with RFA due to AF or flutter had elevated cTnI, CK-MB and hFABP levels compared to patients with AVNRT (cTnI: 1.14+/- 0.49 microg/L vs. 0.59+/-0.25 microg/L, p<0.05; CK-MB: 4.46+/- 2.07 microg/L vs. 2.81+/-1.54 mug/L, p<0.05; hFABP: 3.21+/- 0.98 microg/L vs. 2.25+/-0.54 microg/L, p<0.01).


CONCLUSIONS
Myocardial injury induced by RFA can be detected by cTnI, CK-MB, hFABP and GPBB. Plasma cTnI, CK-MB and hFABP levels significantly increased in patients with AFL and AF compared to patients with AVNRT. The increase of cTnI, CK-MB and GPBB levels correlates with the total duration of RFA.
Pudil
Radek
R
First Department of Medicine, Charles University Prague, Faculty of Medicine, Hradec Kralove, Czech Republic. pudilradek@yahoo.com
Parízek
Petr
P
Tichý
Milos
M
Haman
Ludek
L
Horáková
Lucie
L
Ulrychová
Martina
M
Vojácek
Jan
J
Palicka
Vladimír
V
D000328:Adult; D015415:Biomarkers / Q000032:analysis / Q000097:blood; D017115:Catheter Ablation / Q000009:adverse effects*; D005260:Female; D006801:Humans; D008297:Male; D046228:Microarray Analysis / Q000379:methods*; D008875:Middle Aged; D009203:Myocardial Infarction / Q000175:diagnosis* / Q000209:etiology*; D011446:Prospective Studies; D055815:Young Adult
D015415:Biomarkers