Do daily threshold trend fluctuations of epicardial leads correlate with pacing and sensing characteristics in paediatric patients?
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Do daily threshold trend fluctuations of epicardial leads correlate with pacing and sensing characteristics in paediatric patients? / Tomaske, Maren; Harpes, Paul; Dodge-Khatami, Ali; Amacker, Nadja; Bauersfeld, Urs.
In: EUROPACE, Vol. 9, No. 8, 08.2007, p. 662-668.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - Do daily threshold trend fluctuations of epicardial leads correlate with pacing and sensing characteristics in paediatric patients?
AU - Tomaske, Maren
AU - Harpes, Paul
AU - Dodge-Khatami, Ali
AU - Amacker, Nadja
AU - Bauersfeld, Urs
PY - 2007/8
Y1 - 2007/8
N2 - AIMS: To evaluate whether the magnitude of daily ventricular pacing threshold fluctuations (Deltafluctuation) in trend graphs of stored diagrams correlate with ventricular threshold and sensing changes over time.METHODS AND RESULTS: A total of 56 children received AutoCapture devices (St. Jude Medical, Sylmar, CA, USA) connected to steroid-eluting epicardial leads. Maximum lead age at study closure was 12.2 years (median 4.0). Telemetry data and daily Deltafluctuation were obtained every 6 months. Regression slope coefficients and mean values of repeated measurements were calculated for each patient's course. High daily Deltafluctuation correlated with higher pacing thresholds (rho = 0.68, P < 0.001), lower impedances (rho = -0.38, P = 0.004), and a Deltafluctuation-incline (rho = 0.34, P = 0.01) over time. Furthermore, a Deltafluctuation-incline correlated with a pacing threshold-incline (rho = 0.34, P = 0.01). No correlation was observed for ventricular sensing. Higher daily Deltafluctuation were observed if lead age was > 5 years compared with CONCLUSION: High amplitudes of daily Deltafluctuation correlate with higher and increasing pacing thresholds and lower impedances. Theoretically, this results from electrode microinstability on the epicardial surface. A decrease of the steroid-eluting potency of the electrode can be hypothesized to cause higher daily Deltafluctuation beyond a lead age of 5 years. Potential implications of marked daily Deltafluctuation are short-term follow-up and lead replacement in the presence of high pacing thresholds.
AB - AIMS: To evaluate whether the magnitude of daily ventricular pacing threshold fluctuations (Deltafluctuation) in trend graphs of stored diagrams correlate with ventricular threshold and sensing changes over time.METHODS AND RESULTS: A total of 56 children received AutoCapture devices (St. Jude Medical, Sylmar, CA, USA) connected to steroid-eluting epicardial leads. Maximum lead age at study closure was 12.2 years (median 4.0). Telemetry data and daily Deltafluctuation were obtained every 6 months. Regression slope coefficients and mean values of repeated measurements were calculated for each patient's course. High daily Deltafluctuation correlated with higher pacing thresholds (rho = 0.68, P < 0.001), lower impedances (rho = -0.38, P = 0.004), and a Deltafluctuation-incline (rho = 0.34, P = 0.01) over time. Furthermore, a Deltafluctuation-incline correlated with a pacing threshold-incline (rho = 0.34, P = 0.01). No correlation was observed for ventricular sensing. Higher daily Deltafluctuation were observed if lead age was > 5 years compared with CONCLUSION: High amplitudes of daily Deltafluctuation correlate with higher and increasing pacing thresholds and lower impedances. Theoretically, this results from electrode microinstability on the epicardial surface. A decrease of the steroid-eluting potency of the electrode can be hypothesized to cause higher daily Deltafluctuation beyond a lead age of 5 years. Potential implications of marked daily Deltafluctuation are short-term follow-up and lead replacement in the presence of high pacing thresholds.
KW - Cardiac Pacing, Artificial/methods
KW - Child
KW - Child, Preschool
KW - Differential Threshold
KW - Electrocardiography/methods
KW - Electrodes, Implanted
KW - Female
KW - Humans
KW - Male
KW - Pericardium
KW - Reproducibility of Results
KW - Sensitivity and Specificity
KW - Therapy, Computer-Assisted/methods
KW - Ventricular Fibrillation/diagnosis
U2 - 10.1093/europace/eum100
DO - 10.1093/europace/eum100
M3 - SCORING: Journal article
C2 - 17573359
VL - 9
SP - 662
EP - 668
JO - EUROPACE
JF - EUROPACE
SN - 1099-5129
IS - 8
ER -