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January 31, 2026REC interventional cardiology (English Edition)0 citationsOpen Access

Clinical utility of thrombus aspiration using the Hunter catheter in patients with acute myocardial infarction: the Hunted registry

DBDarío G. Borraz-NoriegaJAJoan F. Andrés-CordónECElena Cañedo

Key Result

Manual thrombectomy using the Hunter catheter was effective in 81.5% of selected STEMI patients undergoing primary PCI, with higher success in vessels >2.5 mm and high thrombus burden.

Key Points

  • This study evaluates the outcomes and predictors of success for manual thrombectomy in acute myocardial infarction cases.
  • Retrospective cohort study of 750 patients treated with manual thrombectomy using the Hunter catheter.
  • Success defined as angiographic reduction to grade ≤ 2 on the TIMI scale.
  • Clinical follow-up assessed for major adverse cardiovascular events.
  • Manual thrombectomy was performed in 401 (53%) of patients.
  • Thrombectomy was successful in 327 (81.55%) patients.
  • Effective predictors included greater vessel diameter (p < 0.001) and TIMI thrombus load ≥ 4 (p < 0.001).

Study Design

Type

Cohort (n=401)

Multicenter

No

Structured PICO

P
Population
401 patients with ST-segment elevation myocardial infarction (STEMI) undergoing primary percutaneous coronary intervention (PCI) with manual thrombectomy using the Hunter catheter. Mean age 62.38 years, 80% male, single-center in Spain.
I
Intervention
Manual thrombectomy using the Hunter aspiration catheter (140 cm rapid-exchange, 6-Fr compatible) during primary percutaneous coronary intervention.
O
Outcome
Success of thrombus aspiration (effective manual thrombectomy), defined as an angiographical reduction in thrombus burden achieving a TIMI thrombus grade ≤ 2 (thrombus dimension < 50% of the vessel diameter).surrogate

Manual thrombectomy using the Hunter catheter is a safe and effective strategy for reducing thrombus burden in selected STEMI patients with high thrombus burden and large vessel diameters.

Limitations

  • Single-center, observational, retrospective registry design limits extrapolation of results.
  • No control group of patients who underwent PCI without manual thrombectomy.
  • Retrospective design prevented determining the cause of ineffective manual thrombectomy in all patients.
  • Angiographic analysis was not performed by an independent core laboratory.
  • Small sample size of the 2 groups (effective vs noneffective MT) limiting statistical power to detect differences in final procedural success

Abstract

Introducción y objetivos: La trombectomía manual (TM) en la intervención coronaria percutánea primaria (ICPp) intenta reducir la carga trombótica. Este estudio evalúa los resultados y los factores predictores de éxito de la TM. Métodos: El registro Hunted es un estudio de cohortes retrospectivo, unicéntrico, de pacientes tratados con TM en ICPp utilizando el catéter Hunter, desde julio de 2020 hasta febrero de 2022. El éxito de la TM se definió como una disminución angiográfica a grado ≤ 2 en la escala Thrombolysis in Myocardial Infarction (TIMI), con seguimiento clínico de eventos cardiovasculares adversos mayores. Resultados: De los 750 pacientes con infarto agudo de miocardio tratados con ICPp, en 401 (53%) se realizó TM. Los pacientes tratados tenían una edad media de 62 años y el 80% eran varones. La TM fue efectiva en 327 (81,55%) pacientes. Los predictores de TM efectiva fueron un mayor diámetro del vaso (p 2,5 mm, es una técnica eficaz y segura con una baja tasa de complicaciones. Palabras clave: Infarto de miocardio con elevación del segmento ST. Intervención coronaria percutánea primaria. Trombectomía manual. Carga trombótica.

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Cite This Study

Borraz-Noriega et al. (2026) conducted a cohort in ST-segment elevation myocardial infarction (STEMI) (n=401). Manual thrombectomy using the Hunter catheter was evaluated on Effective manual thrombectomy (angiographical reduction in thrombus burden to TIMI thrombus grade ≤ 2). Manual thrombectomy using the Hunter catheter was effective in 81.5% of selected STEMI patients undergoing primary PCI, with higher success in vessels >2.5 mm and high thrombus burden.

synapsesocial.com/papers/6a0258fe45880192ae423cf2https://doi.org/10.24875/recice.m25000556
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