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Operant Conditioning Intervention01:24

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Operant conditioning serves as a foundational principle in therapeutic interventions aimed at modifying maladaptive behaviors. Central to this approach is the notion that behaviors, both adaptive and maladaptive, are learned through reinforcement. By analyzing the environmental factors that reinforce problematic behaviors, clinicians can design interventions to weaken these reinforcements and replace maladaptive behaviors with healthier alternatives.
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Heart Failure VII: Nursing Interventions01:30

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The first step in nursing management of a patient with heart failure involves thoroughly assessing the patient's medical history.Subjective Data: Obtain the patient's medical history of coronary artery disease, hypertension, myocardial infarction, and symptoms like dyspnea, orthopnea, and paroxysmal nocturnal dyspnea.Objective Data: Conduct a physical examination to identify findings such as jugular vein distention, pulmonary crackles, tachycardia, murmurs, peripheral edema, and vital signs,...
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Interventional Diagnostic Procedure: A Practical Guide for the Assessment of Coronary Vascular Function
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MR-guided Cardiac Interventions.

Kuberan Pushparajah1,2, Henry Chubb1,2, Reza Razavi1,2

  • 1Division of Imaging Sciences and Biomedical Engineering, King's College London.

Topics in Magnetic Resonance Imaging : TMRI
|June 6, 2018
PubMed
Summary
This summary is machine-generated.

Magnetic resonance imaging (MRI) offers a radiation-free alternative for cardiac catheterization, enhancing visualization and quantification. Advancements in MRI-compatible hardware are enabling safer, real-time guidance for complex interventions, moving towards mainstream clinical adoption.

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Area of Science:

  • Cardiovascular Imaging
  • Medical Interventions
  • Radiation Safety

Background:

  • Cardiac catheterization is vital for congenital heart disease but involves radiation risks, especially for pediatric patients.
  • Magnetic resonance imaging (MRI) provides superior soft tissue detail, characterization, and flow quantification compared to traditional methods.
  • Previous MRI-guided catheterization efforts combined X-ray and MRI or used pre-acquired MRI datasets for guidance.

Purpose of the Study:

  • To review the evolution and potential of MRI-guided cardiac catheterization as a safer alternative to X-ray fluoroscopy.
  • To highlight technological advancements enabling real-time, accurate catheter navigation within the MRI environment.
  • To assess the current status and future prospects of MRI-guided interventions in clinical practice.

Main Methods:

  • Review of hybrid X-ray and MRI-guided techniques for diagnostic and interventional procedures.
  • Exploration of purely MRI-guided catheterization using passive and active catheter tracking.
  • Discussion of advancements in MRI-compatible guidewires, hardware, and software for improved visualization and control.
  • Examination of expanded applications in electrophysiology studies and animal models.

Main Results:

  • Hybrid and purely MRI-guided catheterization have been clinically validated for specific applications like pulmonary vascular resistance assessment.
  • Development of MRI-compatible guidewires enabled initial human trials, though limitations were encountered.
  • Recent technological improvements enhance real-time catheter visualization and navigation, expanding procedural capabilities.
  • MRI-guided electrophysiology and ablation procedures are now feasible in humans, with promising animal study results.

Conclusions:

  • MRI-guided cardiac catheterization offers a promising, radiation-free approach for diagnosing and treating congenital heart disease.
  • Continued development of MRI-compatible guidewires and real-time imaging technology is crucial for widespread clinical adoption.
  • MRI-guided interventions are expanding beyond diagnostic procedures to include complex electrophysiology and ablation, with significant future potential.