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Related Concept Videos

Node Analysis for AC Circuits01:14

Node Analysis for AC Circuits

789
Consider an angioplasty system featuring a catheter equipped with a turbine, a critical tool for removing plaque deposits from coronary arteries. This intricate medical device operates using a circuit model reminiscent of a dual-node RLC circuit powered by a current-controlled voltage source.
To unravel the complexities of this system, nodal analysis is employed, a powerful technique founded on Kirchhoff's current law (KCL), which remains valid for phasors. AC circuits can effectively be...
789

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Updated: Apr 15, 2026

Reduction of Radiation Exposure during Endovascular Treatment of Peripheral Arterial Disease Combining Fiber Optic RealShape Technology and Intravascular Ultrasound
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Rotational atherectomy: Technical update.

Paula Mota1, Adam de Belder2, António Leitão-Marques1

  • 1Cardiovascular Intervention Unit, Coimbra University Hospital Centre, Coimbra, Portugal.

Revista Portuguesa De Cardiologia : Orgao Oficial Da Sociedade Portuguesa De Cardiologia = Portuguese Journal of Cardiology : an Official Journal of the Portuguese Society of Cardiology
|April 7, 2015
PubMed
Summary

Rotational atherectomy (RA) has evolved from plaque removal to a less aggressive technique for treating calcified coronary artery disease. Modern RA improves stent delivery and long-term outcomes in complex lesions.

Keywords:
Aterectomia rotacionalCalcificação coronáriaCoronary calcificationIntervenção coronária percutâneaPercutaneous coronary interventionRotational atherectomyRotational atherectomy techniqueTécnica de aterectomia rotacional

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Area of Science:

  • Cardiology
  • Interventional Cardiology
  • Vascular Medicine

Background:

  • Percutaneous coronary intervention is a common treatment for symptomatic coronary artery disease.
  • Elderly, diabetic, and renal patients often have complex calcified coronary lesions.
  • Rotational atherectomy (RA) is a technique used to treat these challenging lesions.

Purpose of the Study:

  • To review the evolution and current technique of rotational atherectomy (RA).
  • To highlight RA's role in preparing calcified lesions for percutaneous coronary intervention.
  • To discuss the shift towards a more conservative RA approach.

Main Methods:

  • Review of historical and current literature on rotational atherectomy.
  • Analysis of the changing mechanisms and techniques of RA.
  • Discussion of RA's adjunctive role with drug-eluting stents.

Main Results:

  • Early RA focused on plaque removal with high-velocity, large burrs, leading to complications.
  • Drug-eluting stents reduced restenosis, repositioning RA as a lesion preparation tool.
  • Current RA uses smaller burrs and lower speeds, enhancing safety and outcomes.

Conclusions:

  • Rotational atherectomy has transformed into a compliance-modifying technique.
  • A less aggressive RA approach improves stent delivery, expansion, and long-term results.
  • RA is a valuable adjunctive therapy for complex calcified coronary lesions.