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BIO|STREAM.CSP CLS

2026年7月16日 更新者:Biotronik SE & Co. KG

Observation of Clinical Routine Care for Patients Implanted With BIOTRONIK Devices Used for Conduction System Pacing (CSP) With Focus on Closed Loop Stimulation (CLS)

This clinical study is a prospective, observational submodule of the BIO|STREAM.CSP registry designed to evaluate clinical outcomes in patients receiving BIOTRONIK dual-chamber pacemakers that combine conduction system pacing-specifically left bundle branch area pacing (LBBAP)-with Closed Loop Stimulation (CLS). The purpose of the study is to better understand how this combined pacing strategy performs in routine clinical practice and whether it may help reduce the occurrence of atrial fibrillation in patients with sinus node dysfunction (SND) and concomitant atrioventricular (AV) conduction disorders.

The primary question the study seeks to answer is what the incidence of device-detected atrial fibrillation (DDAF) is over a 24-month follow-up period in patients treated with LBBAP and active CLS. Additionally, the study explores how CLS dynamically modulates pacing rates when the ventricular lead is positioned within the conduction system, and whether this physiological pacing approach may mitigate the negative effects associated with conventional right ventricular pacing.

Overall, this study aims to generate real-world evidence to support optimization of pacemaker programming and to inform clinical decision-making regarding the use of CLS in combination with conduction system pacing, with the goal of improving patient outcomes and reducing atrial arrhythmia burden.

調査の概要

詳細な説明

This study, BIO|STREAM.CSP CLS, is a prospective, observational submodule of the ongoing BIO|STREAM.CSP registry. It is designed to collect real-world clinical data from patients who receive BIOTRONIK dual-chamber pacemakers using conduction system pacing (CSP), with a specific focus on the combination of left bundle branch area pacing (LBBAP) and Closed Loop Stimulation (CLS).

Permanent cardiac pacing is a standard therapy for patients with sinus node dysfunction (SND), a condition in which the heart's natural pacemaker does not function properly. A considerable proportion of these patients also have atrioventricular (AV) conduction disorders, which impair the electrical connection between the atria and ventricles. In such cases, dual-chamber pacemakers are typically implanted to maintain appropriate heart rhythm and coordination.

Traditional right ventricular (RV) pacing, while effective in maintaining heart rate, has been associated with non-physiological activation of the heart and may contribute to an increased risk of atrial fibrillation (AF), especially when pacing burden is high. Device-detected atrial fibrillation (DDAF) is a clinically relevant outcome, as it is associated with increased risk of stroke, heart failure, and other cardiovascular complications.

Closed Loop Stimulation (CLS) is an advanced pacemaker feature designed to provide more physiological heart rate adaptation by continuously monitoring cardiac contractility and adjusting the pacing rate accordingly. In previous studies, including the B3 trial, CLS demonstrated a reduction in DDAF incidence in patients with SND. However, this benefit was not observed in patients with AV block, likely due to the adverse effects of frequent RV pacing.

Conduction system pacing, and in particular left bundle branch area pacing (LBBAP), is an emerging pacing strategy that stimulates the heart's intrinsic conduction pathways, resulting in a more physiological and synchronized ventricular activation. This approach has the potential to reduce the negative effects associated with RV pacing.

The BIO|STREAM.CSP CLS submodule aims to investigate whether the combination of LBBAP and CLS can reduce the incidence of DDAF in patients with both SND and AV conduction disorders in routine clinical practice. The study will follow approximately 150 patients over a 24-month period after pacemaker implantation. Patients included are those enrolled in the BIO|STREAM.CSP registry who receive a de novo dual-chamber pacemaker with activated CLS and LBBAP, and who have no prior history of atrial fibrillation.

The primary objective of this exploratory submodule is to assess the incidence and timing of DDAF episodes following activation of CLS, using device-based diagnostics over the follow-up period. The study will evaluate multiple thresholds of AF episode duration (e.g., ≥6 minutes, ≥6 hours, ≥24 hours, and ≥7 days), as well as the time to first occurrence and overall AF burden. Secondary analyses will explore how CLS modulates heart rate in patients with conduction system pacing, including the distribution of paced and sensed heart rates over time.

As an observational study without a control group, BIO|STREAM.CSP CLS is intended to generate hypothesis-generating, real-world evidence rather than to test a predefined hypothesis. The findings are expected to provide insights into the clinical performance of CLS in combination with LBBAP and to support optimization of device programming strategies.

Overall, this study seeks to improve understanding of how advanced pacing technologies can be used together to deliver more physiological cardiac pacing, with the goal of reducing atrial arrhythmias and improving long-term outcomes in patients requiring permanent pacemakers.

研究の種類

観察的

入学 (推定)

150

連絡先と場所

このセクションには、調査を実施する担当者の連絡先の詳細と、この調査が実施されている場所に関する情報が記載されています。

研究連絡先

研究連絡先のバックアップ

研究場所

      • Brindisi、イタリア
        • まだ募集していません
        • Ospedale Di Summa - Perrino
        • コンタクト:
      • Milan、イタリア
        • まだ募集していません
        • Niguarda Hospital
        • コンタクト:
      • Novara、イタリア
        • 募集
        • A.O.U. Maggiore della Carita di Novara
        • コンタクト:
      • Piove di Sacco、イタリア
      • Roma、イタリア
        • まだ募集していません
        • Fondazione Policlinico Universitario "Agostino Gemelli" Università Cattolica del Sacro Cuore
        • コンタクト:
      • Taranto、イタリア
        • まだ募集していません
        • SS Annunziata Taranto
        • コンタクト:
      • Madrid、スペイン
        • まだ募集していません
        • Hospital Universitario 12 de Octubre
        • コンタクト:
      • Valencia、スペイン
        • まだ募集していません
        • Hospital Universitario La Fe
        • コンタクト:
      • Ústí nad Labem、チェコ
        • まだ募集していません
        • Masarykova Nemocnice V Usti Nad Labem
        • コンタクト:
      • Budapest、ハンガリー
      • Szeged、ハンガリー
      • Coimbra、ポルトガル
        • まだ募集していません
        • Unidade local de Saúde de Coimbra, EPE - Centro Hospitalar Universitario de Coimbra
        • コンタクト:
        • コンタクト:
          • João Ferreira

参加基準

研究者は、適格基準と呼ばれる特定の説明に適合する人を探します。これらの基準のいくつかの例は、人の一般的な健康状態または以前の治療です。

適格基準

就学可能な年齢

  • 大人

健康ボランティアの受け入れ

いいえ

サンプリング方法

非確率サンプル

調査対象母集団

Patients with an indication for de novo dual-chamber pacing due to SND with evidence of AV conduction disorders, enrolled in the BIO|STREAM.CSP registry.

説明

Inclusion Criteria:

  • Enrolled in the BIO|STREAM.CSP registry
  • Standard indication for dual-chamber pacing due to any form of sinus node disease according to guidelines
  • DDD-CLS pacing mode activated
  • Either ≥ II degree AV block, or native PR interval ≥ 200 ms at baseline ECG with expected RVP ≥ 20%

Exclusion Criteria:

  • Implantation dates back more than 90 days
  • History of clinical AF
  • Patients intended to receive, or already received a pacing lead for traditional RV pacing, His bundle pacing or right bundle branch pacing
  • Upgrade from previous pacemaker system
  • Patients transitioning from the BIO|MASTER.CSP study
  • DDAF episodes present in the device memory at the time of registration

研究計画

このセクションでは、研究がどのように設計され、研究が何を測定しているかなど、研究計画の詳細を提供します。

研究はどのように設計されていますか?

デザインの詳細

この研究は何を測定していますか?

主要な結果の測定

結果測定
メジャーの説明
時間枠
DDAF incidence
時間枠:From CLS activation to 24 months after implantation
Time from CLS activation to the first device-detected atrial fibrillation (DDAF) episode of different duration cutoffs (6 minutes, 6 hours, 24 hours, 7 days) through 24 months of follow-up after implantation
From CLS activation to 24 months after implantation
DDAF burden
時間枠:From CLS activation to 24 months after implantation
The time from CLS activation to the first day with a DDAF burden ≥1% (≈15 minutes) determined within a follow-up period of 24 months after implantation
From CLS activation to 24 months after implantation
Heart Rate histograms
時間枠:At 1 year and 2 years after implantation
Heart Rate histograms of sensed and paced beats [% time] at 1-year and 2-year follow-ups
At 1 year and 2 years after implantation

協力者と研究者

ここでは、この調査に関係する人々や組織を見つけることができます。

スポンサー

研究記録日

これらの日付は、ClinicalTrials.gov への研究記録と要約結果の提出の進捗状況を追跡します。研究記録と報告された結果は、国立医学図書館 (NLM) によって審査され、公開 Web サイトに掲載される前に、特定の品質管理基準を満たしていることが確認されます。

主要日程の研究

研究開始 (実際)

2026年5月29日

一次修了 (推定)

2028年5月29日

研究の完了 (推定)

2030年5月29日

試験登録日

最初に提出

2026年5月20日

QC基準を満たした最初の提出物

2026年5月20日

最初の投稿 (実際)

2026年5月27日

学習記録の更新

投稿された最後の更新 (実際)

2026年7月17日

QC基準を満たした最後の更新が送信されました

2026年7月16日

最終確認日

2026年5月1日

詳しくは

この情報は、Web サイト clinicaltrials.gov から変更なしで直接取得したものです。研究の詳細を変更、削除、または更新するリクエストがある場合は、register@clinicaltrials.gov。 までご連絡ください。 clinicaltrials.gov に変更が加えられるとすぐに、ウェブサイトでも自動的に更新されます。

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