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Long-term hemodynamic benefit of biventricular pacing depending on coronary sinus lead position

Langfristiger Benefit der biventrikulären Stimulation in Abhängigkeit von der Elektrodenposition in den Koronarvenen

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Zusammenfassung

Einführung

Akute Testungen unter biventrikulärer Stimulation zeigten, dass der hämodynamische Effek von der Position der Koronarsinus-(CS)-Elektrode abhängt. Langzeituntersuchungen hierzu liegen jedoch bislang nicht vor.

Methoden

Bei 45 Patienten (Alter 59±10 Jahre) mit Herzinsuffizienz (17 dilatative Kardiomyopathie, 23 ischämische, 5 valvuläre) und Linksschenkelbock (QRS-Breite >150 ms) wurden biventrikuläre Schrittmachersysteme implantiert. Die CS-Elektroden wurden posterior (P, n=15), lateral (L, n=19) oder bei fehlenden anderen Optionen anterior (A, n=11) implantiert. Präoperativ und nach 6 Monaten wurden Klinik, BNP, Echokardiographie und Rechtsherzkatheter beurteilt.

Ergebnisse

Eingangsparameter waren in den 3 Gruppen ähnlich. Nach 6 Monaten fanden sich 32/34 Responder in den Gruppen P und L verglichen mit 7/11 in Gruppe A (94 vs. 64%, p=0,025). Die Ejektionsfraktion steigerte sich in den Gruppen P und L um 40 und 41% vs. nur 19% in A (p<0,03 für A vs. P+L). BNP-Spiegel sanken deutlicher in den Gruppen P und L (–55 und –35% vs. –27%, p=0,05 für Avs. P). Die Hämodynamik verbesserte sich nur in den Gruppen P und L: Arterieller Druck +8 und 9% vs. +2%, PCWP –23 und –15% vs. –4%, Pulmonalisdruck –18 und –12% vs. –3% (p<0,01 für A vs. P+L), Herzindex +21 und +12% vs. +11% (p=0,03 für A vs. P).

Schlussfolgerung

Chronische biventrikuläre Stimulation verbessert Klinik, Auswurffraktion, BNP und Hämodynamik bei Patienten mit posteriorer und lateraler CS-Elektrodenposition. Anteriore CS-Elektrodenpositionen sollten vermieden werden.

Summary

Background

Acute studies in cardiac resynchronization therapy (CRT) showed that hemodynamic effects may depend on the coronary sinus (CS) lead position. However, there are no data on the longterm effect of CS lead position.

Methods

In 45 heart failure patients with left bundle branch block and QRS >150 ms (age 59±10 years, 17 dilative cardiomyopathy, 23 ischemic, 5 valvular), biventricular pacemakers were implanted. CS leads were positioned in posterior (P, n=15), lateral (L, n=19) or, if no other option available, anterior (A, n=11) side branches. Before and 6 months after implantation, clinical state, echocardiography, brain natriuretic peptide (BNP) and right heart catheterization were evaluated.

Results

Baseline parameters were similar between groups. After 6 months, there were 32/34 responders in groups P and L compared to 7/11 responders in group A (94 vs roups P and L: Arterial pressure +8 and +9% vs +2%; PCWP –23 and –15% vs –4%, pulmonary pressure –18 and –12% vs –3% (p<0.01 for A vs P+L); cardiac index +21 and +12% vs +11% (p=0.03 for A vs P). BNP was reduced by 55, 35, and 27% (p=0.05 for A vs P). Ejection fraction increased in P and L by 40 and 41%, respectively, but only by +19% in A (p<0.03 for A vs P+L).

Conclusion

Chronic CRT improves ejection fraction, BNP and hemodynamic measurements predominantely in patients with lateral and posterior CS lead positions. Anterior lead positions should be avoided.

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Correspondence to H. Nägele.

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Nägele, H., Hashagen, S., Azizi, M. et al. Long-term hemodynamic benefit of biventricular pacing depending on coronary sinus lead position. Herzschr. Elektrophys. 17, 185–190 (2006). https://doi.org/10.1007/s00399-006-0533-x

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  • DOI: https://doi.org/10.1007/s00399-006-0533-x

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