In brief
A funded NHLBI proposal to develop and pilot 'Cardiac Fears Treatment,' an exposure-based therapy for PTSD after cardiac events. It lays out aims and a small staged trial but reports no results yet.
What this article is about
Quick Answer
A funded NHLBI proposal to develop and pilot 'Cardiac Fears Treatment,' an exposure-based therapy for PTSD after cardiac events. It lays out aims and a small staged trial but reports no results yet.
Student takeaways
Key Takeaways
- The proposal states that more than one in five patients who receive an implantable cardioverter defibrillator (ICD) show elevated PTSD symptoms after their cardiac event.
- It reports (as background) that cardiac disease-induced PTSD is associated with worse mental health and a worse clinical prognosis, including poorer quality of life, greater disability, and higher risk of event recurrence or death.
- The team proposes developing a new, streamlined intervention called Cardiac Fears Treatment (CFT) that targets cardiac trauma-related fear and cardiac-focused anxiety sensitivity.
- CFT is designed by adapting two established, evidence-based techniques, trauma-focused exposure and interoceptive exposure, which the authors note have not yet been tested in cardiac-trauma patients.
- The plan is a staged pilot study: an N=8 open trial for feasibility followed by a pilot randomized controlled trial of 70 ICD patients comparing CFT with standard supportive therapy, assessed through a six-month follow-up.
Student summary
Why This Research Matters
This document is the project summary for a funded research proposal (an R34 grant supported by the U.S. National Heart, Lung, and Blood Institute), led by Dr. Jennifer Sumner and Dr. Kate Wolitzky-Taylor. Because it is a proposal, it describes what the researchers plan to do and why; it does not report results. Keeping that in mind is essential: everything below is about aims, rationale, and study design, not proven outcomes.
The problem the team addresses is that sudden, life-threatening cardiac events can be terrifying and can trigger post-traumatic stress disorder (PTSD). The summary states that PTSD symptoms are common after cardiac events, noting that more than one in five patients who receive an implantable cardioverter defibrillator (ICD), a device used to prevent life-threatening arrhythmias and sudden cardiac arrest, show elevated PTSD symptoms. According to the summary, cardiac disease-induced PTSD is linked not only to worse mental health but also to a worse medical prognosis, including poorer quality of life, greater disability, and greater risk of another cardiac event or death. The team also highlights 'cardiac-focused anxiety sensitivity,' a particular fear of bodily sensations connected to the heart, which they say is linked to worse health, seeking medical reassurance, and higher healthcare use.
The researchers argue that evidence-based treatments for these cardiac-related psychological problems are lacking. Their plan is to draw on existing, proven psychotherapies to build a streamlined new intervention they call Cardiac Fears Treatment (CFT). CFT would target two key manifestations of PTSD after cardiac events: cardiac trauma-related fear and cardiac-focused anxiety sensitivity. The building blocks are trauma-focused exposure (which reduces trauma-related fear) and interoceptive exposure (which reduces anxiety sensitivity). The team notes that neither approach has yet been tested in patients whose trauma comes from a cardiac event.
The design has stages. First, in Stage Ia, the team will develop the CFT intervention using an iterative approach guided by prior research and interviews with stakeholders such as cardiology experts, followed by a small open trial of eight patients with ICDs to gather early feasibility and acceptability information. Then, in Stage Ib, they will run a pilot randomized controlled trial with 70 ICD patients from the UCLA Cardiac Arrhythmia Center. Participants will be randomly assigned either to CFT or to standard supportive therapy (treatment as usual). They will be assessed before treatment, at several points during it, after it, and at a six-month follow-up. The four aims are, in order, to develop CFT, to compare CFT with usual care on psychological responses, to compare it on health-related outcomes such as quality of life and healthcare use, and finally to explore whether the targeted psychological processes explain any change in health outcomes.
For nursing students, this proposal is a good example of mechanism-focused intervention research and of how pilot studies are built before larger trials. It shows how a team identifies a specific, understudied problem (trauma after a cardiac event), grounds a new treatment in established therapies, and plans a careful, staged test with feasibility, acceptability, and preliminary efficacy as goals rather than definitive proof.
It is equally important to read this piece for what it cannot tell us. Because it is a proposal, there are no findings yet: we do not know whether CFT works, how well, or for whom. The planned pilot trial is small (70 participants) and is designed to test feasibility and generate preliminary data to justify a larger trial, not to establish effectiveness. The statistics quoted (such as more than one in five ICD patients showing elevated PTSD symptoms) are background context the authors cite to justify the work, not results of this study.
From a clinical standpoint, the proposal reinforces something nurses can apply now: patients who survive frightening cardiac events may carry psychological wounds, and screening for anxiety and trauma symptoms, offering reassurance, and connecting patients to mental-health support are reasonable, safe practices. Any specific exposure-based therapy, however, should be delivered by trained clinicians, and students should await the study's actual results before drawing conclusions about CFT itself.
Source abstract
Study Overview
Project Summary Sudden, life-threatening cardiac events can be terrifying experiences that can trigger the onset of posttraumatic stress disorder (PTSD). PTSD symptoms are common after cardiac events, with over 1 in 5 patients receiving implantable cardioverter defibrillators (ICDs) for prevention of life-threatening arrhythmias and sudden cardiac arrest exhibiting elevated PTSD symptoms. Cardiac disease-induced PTSD symptoms are associated not only with worse mental health but a worse clinical prognosis, including poorer quality of life (QoL), greater disability, and greater risk of event recurrence and/or all-cause mortality. Further, cardiac-focused anxiety sensitivity—a unique aspect of cardiac disease-induced PTSD—is linked to worse health, medical reassurance seeking, and greater healthcare utilization. However, evidence-based interventions for these cardiac-induced psychological presentations are lacking. This R34 proposal will draw from existing, evidence-based psychotherapies to develop a streamlined intervention that addresses cardiac trauma-related fear and cardiac-focused anxiety sensitivity— two key manifestations of PTSD after cardiac events that relate to adverse outcomes and are direct targets of gold standard, exposure-based interventions for PTSD and panic disorder. Trauma-focused exposure reduces trauma-related fear and interoceptive exposure reduces anxiety sensitivity, but neither intervention has been tested in patients with cardiac trauma. After initial intervention development (Stage Ia), a pilot randomized controlled trial (RCT) will be conducted (Stage Ib), in which patients with ICDs (N=70) from the UCLA Cardiac Arrhythmia Center will be randomized to 1) the trauma and anxiety sensitivity exposure-based treatment, called Cardiac Fears Treatment (CFT), or 2) standard supportive therapy (treatment as usual [TAU]). Participants will be assessed at pre-treatment, several periods throughout treatment, post-treatment, and a 6-month follow-up. In Aim 1, we will develop the CFT intervention using an iterative approach, guided by prior research and qualitative interviews with key stakeholders (e.g., cardiology experts), and pilot testing in a small (N=8) open trial of patients with ICDs will yield initial feasibility and acceptability data. Subsequent aims will analyze data from the pilot RCT, generating additional feasibility and acceptability data, along with preliminary efficacy information. In Aim 2, we will compare CFT to TAU on psychological responses (self-report and behavioral task measures of cardiac trauma-related fear and cardiac-focused anxiety sensitivity). Aim 3 will compare CFT to TAU on health- related outcomes (health-related QoL and healthcare utilization). Finally, in Aim 4, we will explore whether key psychological processes targeted in the intervention (cardiac trauma-related fear and cardiac-focused anxiety sensitivity) mediate change in health-related outcomes. By targeting key psychological processes associated with adverse outcomes after a cardiac trauma, this mechanism-focused study has the potential to improve the emotional and physical health of cardiac patients and will generate critical feasibility, acceptability, and preliminary efficacy data needed to inform a grant proposal to test a refined version of CFT in a larger RCT.
Evidence appraisal
Main Findings
- The proposal states that more than one in five patients who receive an implantable cardioverter defibrillator (ICD) show elevated PTSD symptoms after their cardiac event.
- It reports (as background) that cardiac disease-induced PTSD is associated with worse mental health and a worse clinical prognosis, including poorer quality of life, greater disability, and higher risk of event recurrence or death.
- The team proposes developing a new, streamlined intervention called Cardiac Fears Treatment (CFT) that targets cardiac trauma-related fear and cardiac-focused anxiety sensitivity.
- CFT is designed by adapting two established, evidence-based techniques, trauma-focused exposure and interoceptive exposure, which the authors note have not yet been tested in cardiac-trauma patients.
- The plan is a staged pilot study: an N=8 open trial for feasibility followed by a pilot randomized controlled trial of 70 ICD patients comparing CFT with standard supportive therapy, assessed through a six-month follow-up.
Practice transfer
Clinical Relevance
- Because this is a proposal with no results, nurses should not yet treat CFT as an effective therapy; await the study's actual findings.
- Survivors of frightening cardiac events may develop trauma and anxiety symptoms, so screening for these in cardiac and post-ICD care is a reasonable, patient-centered practice.
- Cardiac-focused anxiety sensitivity (fear of heart-related bodily sensations) can drive reassurance-seeking and higher healthcare use, which nurses can recognize and address supportively.
- General psychological support such as listening, education, and referral can be offered by nurses, but specialized exposure-based therapy should be delivered by trained clinicians.
- The proposal reinforces integrated, mind-body care: attending to the emotional impact of cardiac illness may support both mental health and medical outcomes.
Faculty notes
Educational Relevance
Use this R34 project summary to teach the anatomy of a mechanism-focused intervention proposal and the logic of staged, pilot research. Led by Sumner and Wolitzky-Taylor and funded by NHLBI, it proposes developing 'Cardiac Fears Treatment' (CFT) for PTSD symptoms after cardiac events, specifically cardiac trauma-related fear and cardiac-focused anxiety sensitivity, by adapting trauma-focused exposure and interoceptive exposure. The central teaching point is distinguishing a proposal from evidence. There are no findings; the document lays out rationale, aims, and design (Stage Ia development plus an N=8 open trial, then a Stage Ib pilot RCT of N=70 ICD patients randomized to CFT versus treatment as usual, with assessments through a six-month follow-up). Have students identify why a pilot targets feasibility, acceptability, and preliminary efficacy rather than definitive effectiveness, and why a small sample cannot prove a treatment works. The proposal also illustrates the mind-body link in chronic illness: it cites that over one in five ICD recipients show elevated PTSD symptoms and that cardiac-induced PTSD is tied to worse prognosis and higher healthcare use. Instructors can use it to discuss psychological screening in cardiac care, the difference between complementary psychological support any nurse can offer and specialized exposure therapy requiring trained clinicians, and how mediation aims (Aim 4) test the mechanism a treatment is meant to change. It pairs well with a completed RCT for contrast.
Critical appraisal
Limitations
- This is a funded research proposal, not a completed study; it reports no findings about whether CFT works.
- The planned pilot trial is small (N=70, plus an N=8 open trial) and is designed to assess feasibility, acceptability, and preliminary efficacy, not to establish effectiveness.
- Participants will be drawn from a single site (UCLA Cardiac Arrhythmia Center) and limited to ICD patients, which will limit generalizability.
Classroom use
Discussion Questions
- What is the difference between a research proposal and a completed study, and how does that affect how you read this document?
- Why might a sudden cardiac event, or receiving an ICD, trigger post-traumatic stress?
- What is cardiac-focused anxiety sensitivity, and how could it affect a patient's behavior and healthcare use?
- Why do researchers run a small open trial and a pilot RCT before a large trial?
- What can a pilot study establish, and what can it not establish?
- How do trauma-focused exposure and interoceptive exposure differ, and why combine them for cardiac trauma?
- What role can a nurse play in recognizing and supporting psychological distress after a cardiac event?
- Where is the line between general psychological support a nurse can provide and specialized therapy that requires a trained clinician?
- How might drawing participants from a single site and only ICD patients limit what the study can tell us?
- What would you want to see in the study's results before recommending CFT in practice?
Search-ready answers
Frequently asked questions
Does this study prove that Cardiac Fears Treatment works?
No. It is a research proposal describing plans and rationale. No results exist yet, and the pilot trial is designed to test feasibility and gather preliminary data, not to prove effectiveness.
Why would a heart problem cause PTSD?
A sudden, life-threatening cardiac event can be terrifying. The summary notes that more than one in five ICD recipients show elevated PTSD symptoms afterward.
What is an ICD?
An implantable cardioverter defibrillator, a device implanted to detect and stop life-threatening heart rhythms and prevent sudden cardiac arrest.
What is cardiac-focused anxiety sensitivity?
A heightened fear of bodily sensations linked to the heart. The summary says it is tied to worse health, reassurance-seeking, and more healthcare use.
What is CFT built from?
It adapts two established therapies: trauma-focused exposure (to reduce trauma-related fear) and interoceptive exposure (to reduce anxiety sensitivity).
How big is the study?
Small by design: an 8-patient open trial and a 70-patient pilot randomized controlled trial at one center.
Can a nurse do exposure therapy after reading this?
No. Exposure-based therapy should be delivered by trained clinicians. Nurses can, however, screen for distress and connect patients to appropriate support.
Are the numbers in the summary results of this study?
No. Figures like 'over one in five ICD patients' are background from prior research used to justify the project.
What can nurses take from this now?
That cardiac survivors may carry psychological wounds, so screening for anxiety and trauma and offering reassurance and referral are sensible, safe steps.
What would tell us whether CFT is worth adopting?
The study's eventual results, and ultimately a larger, well-powered randomized trial building on this pilot.