Effect of Cardiac Rehabilitation on Left Ventricular Diastolic Function in Patients with Acute Myocardial Infarction

Effect of physical activity on left ventricular dimensions and function after myocardial infarction: a systematic review

INTRODUCTION

Coronary artery disease is the major pathophysiological driver of ventricular remodeling. A multimodal intervention is the key strategy to promote a positive left ventricular remodeling with improvement in volumes and ejection fraction, known as "reverse remodeling." The aim of this review was to highlight the effect of physical activity (PA) on echocardiographic and cardiac magnetic resonance parameters of left ventricle in patients with myocardial infarction.

EVIDENCE ACQUISITION

We performed a systematic review of the literature to summarize current evidence about the efficacy (in terms of improvement in chamber dimensions, ejection fraction, speckle tracking and diastolic function) of physical activity in patients with myocardial infarction, supported by echocardiographic or magnetic resonance data. Articles were searched in Pubmed, Cochrane Library and Biomed Central.

EVIDENCE SYNTHESIS

Only papers published in English and in peer-reviewed journals up to November 2022 were selected. After an initial evaluation, 1029 records were screened; the literature search identified 20 relevant articles. From this data, some PA protocols appeared to favor left ventricular reverse remodeling.

CONCLUSIONS

PA provides beneficial effects on left ventricular parameters analyzed by echocardiography and cardiac magnetic resonance.

Effect of a patient health engagement (PHE) model on rehabilitation participation in patients with acute myocardial infarction after PCI: a study protocol for a randomized controlled trial

BACKGROUND

Participation in cardiac rehabilitation is low in patients with acute myocardial infarction (AMI) after percutaneous coronary intervention (PCI). Although existing rehabilitation methods have achieved certain results, patient participation in exercise rehabilitation is not ideal. The Patient Health Engagement (PHE) model is designed to ensure that patients improve their participation in cognitive, emotional, behavioral, and other aspects in all phases of exercise rehabilitation. The purpose of this study is to confirm whether the rehabilitation method based on the PHE model improves the rate of patient participation and enhances the rehabilitation effect during cardiac rehabilitation in patients with acute myocardial infarction compared with the traditional rehabilitation model.

METHODS/DESIGN

This is a single-center, double-blind, randomized, controlled trial that will enroll 128 patients. Patients with stable acute myocardial infarction after undergoing PCI who received cardiac rehabilitation and postoperative LVEF ≥ 40%, categorized into Killip class I ~ II and with age ≥ 18 years, will be included in the study. Exclusion criteria are mainly malignant arrhythmias, acute heart failure, congestive heart failure, and patients requiring intra-aortic balloon counterpulsation. Patients will be randomized in a 1:1 ratio to the intervention (1) and control (2) groups. Physicians, rehabilitation specialists, patients, and data collectors will be blinded during the study. A rehabilitator and a specialist nurse will conduct the cardiac rehabilitation. The specialist nurse will hand over the sealed bag containing patient information (group 1 or 2) to the physician. Group 1 will undergo cardiac rehabilitation through the PHE model, three times a week for 3 months. The rehabilitation program will be evaluated and adjusted in time from each period of the rehabilitation. Group 2 will be treated with routine cardiac rehabilitation. The rehabilitation participation rate of the two groups will be evaluated before and after 3 months of intervention. The primary outcome will be the level of patient participation in rehabilitation, and the secondary outcome will include general data of patients, postoperative rehabilitation indicators, cardiac rehabilitation knowledge-attitude-practice questionnaire, cardiovascular adverse events, and a brief mood scale.

EXPECTED OUTCOMES

We expect improved cardiac rehabilitation participation rates and rehabilitation outcomes in patients with acute myocardial infarction after undergoing PCI using the PHE model.

DISCUSSION

This approach may increase patient participation in rehabilitation, improve rehabilitation outcomes, and be widely implemented in hospitals and rehabilitation centers.

TRIAL REGISTRATION

ClinicalTrials.gov identifier, ChiCTR2400085276 (Version 2.0 June 04, 2024),  https://www.chictr.org.cn .

TRIAL SPONSOR

Shandong Second Medical university, Weifang, Shandong. Contact name: Dechun Qin, Address: Shandong Second Medical university, Weifang Shandong. Email: 13562666589@163.com.

A case report of cardiac rehabilitation in coronary artery aneurysm combined with acute ST segment elevation myocardial infarction

Coronary artery aneurysm (CAA), marked by diffuse or localized dilation of artery, can cause life-threatening complications in acute coronary syndrome. This report presents a case of CAA combined with acute ST-segment elevation myocardial infarction, successfully treated with cardiac rehabilitation exercise therapy, offering insights for clinical practice.

Impact of cardiac rehabilitation on ventricular-arterial coupling and left ventricular function in patients with acute myocardial infarction

To maintain efficient myocardial function, optimal coordination between ventricular contraction and the arterial system is required. Exercise-based cardiac rehabilitation (CR) has been demonstrated to improve left ventricular (LV) function. This study aimed to investigate the impact of CR on ventricular-arterial coupling (VAC) and its components, as well as their associations with changes in LV function in patients with acute myocardial infarction (AMI) and preserved or mildly reduced ejection fraction (EF). Effective arterial elastance (EA) and index (EAI) were calculated from the stroke volume and brachial systolic blood pressure. Effective LV end-systolic elastance (ELV) and index (ELVI) were obtained using the single-beat method. The characteristic impedance (Zc) of the aortic root was calculated after Fourier transformation of both aortic pressure and flow waveforms. Pulse wave separation analysis was performed to obtain the reflection magnitude (RM). An exercise-based, outpatient cardiac rehabilitation (CR) program was administered for up to 6 months. Twenty-nine patients were studied. However, eight patients declined to participate in the CR program and were subsequently classified as the non-CR group. At baseline, E' velocity showed significant associations with EAI (beta -0.393; P = 0.027) and VAC (beta -0.375; P = 0.037). There were also significant associations of LV global longitudinal strain (LV GLS) with EAI (beta 0.467; P = 0.011). Follow-up studies after a minimum of 6 months demonstrated a significant increase in E' velocity (P = 0.035), improved EF (P = 0.010), and LV GLS (P = 0.001), and a decreased EAI (P = 0.025) only in the CR group. Changes in E' velocity were significantly associated with changes in EAI (beta -0.424; P = 0.033). Increased aortic afterload and VA mismatch were associated with a negative impact on both LV diastolic and systolic function. The outpatient CR program effectively decreased aortic afterload and improved LV diastolic and systolic dysfunction in patients with AMI and preserved or mildly reduced EF.

Predictors of home-based cardiac rehabilitation exercise adherence among patients with chronic heart failure: a theory-driven cross-sectional study

BACKGROUND

The factors influencing home-based cardiac rehabilitation exercise adherence among patients with chronic heart failure remain unclear. This study aimed to explore predictors of home-based cardiac rehabilitation exercise adherence in these patients, based on the theory of planned behavior.

METHODS

This theory-driven, cross-sectional study used convenience sampling to recruit patients with chronic heart failure undergoing home-based cardiac rehabilitation. Instruments used included the Home-Based Cardiac Rehabilitation Exercise Adherence Scale, the Multidimensional Self-Efficacy for Exercise Scale, the Perceived Social Support Scale, and the Tampa Scale for Kinesiophobia Heart. Multivariate linear hierarchical regression analysis was employed to examine the factors influencing exercise adherence.

RESULTS

A total of 215 patients with chronic heart failure undergoing home-based cardiac rehabilitation participated in the study. The overall score for home cardiac rehabilitation exercise adherence was (48.73 ± 3.92). Multivariate linear hierarchical regression analysis revealed that age (β=-0.087, p = 0.012), education level (β = 0.080, p = 0.020), fear of movement (β=-0.254, p < 0.001), perceived social support (β = 0.451, p < 0.001), and exercise self-efficacy (β = 0.289, p < 0.001) influenced home-based cardiac rehabilitation exercise adherence. In the second model, fear of exercise explained 23.60% of the total variance, while perceived social support and exercise self-efficacy explained 26.60% of the total variance in the third model.

CONCLUSION

This study found that home-based cardiac rehabilitation exercise adherence in patients with chronic heart failure was suboptimal, and identified its influencing factors. Targeted interventions addressing these factors, such as tailored education, support, and addressing fear of exercise, may help improve exercise adherence.

Prognostic Implications of Clinical, Laboratory and Echocardiographic Biomarkers in Patients with Acute Myocardial Infarction-Rationale and Design of the ''CLEAR-AMI Study''

BACKGROUND

Acute myocardial infarction (AMI) remains a major cause of death worldwide. Survivors of AMI are particularly at high risk for additional cardiovascular events. Consequently, a comprehensive approach to secondary prevention is necessary to mitigate the occurrence of downstream complications. This may be achieved through a multiparametric tailored risk stratification by incorporating clinical, laboratory and echocardiographic parameters.

METHODS

The ''CLEAR-AMI Study'' (ClinicalTrials.gov Identifier: NCT05791916) is a non-interventional, prospective study including consecutive patients with AMI without a known history of coronary artery disease. All patients satisfying these inclusion criteria are enrolled in the present study. The rationale of this study is to refine risk stratification by using clinical, laboratory and novel echocardiographic biomarkers. All the patients undergo a comprehensive transthoracic echocardiographic assessment, including strain and myocardial work analysis of the left and right heart chambers, within 48 h of admission after coronary angiography. Their laboratory profile focusing on systemic inflammation is captured during the first 24 h upon admission, and their demographic characteristics, past medical history, and therapeutic management are recorded. The angioplasty details are documented, the non-culprit coronary lesions are archived, and the SYNTAX score is employed to evaluate the complexity of coronary artery disease. A 24-month follow-up period will be recorded for all patients recruited.

CONCLUSION

The ''CLEAR-AMI" study is an ongoing prospective registry endeavoring to refine risk assessment in patients with AMI without a known history of coronary artery disease, by incorporating echocardiographic parameters, biochemical indices, and clinical and coronary characteristics in the acute phase of AMI.

Cardiac and Pulmonary Rehabilitation: Two Underutilized Approaches with Some Unexpected Benefits

Although still underutilized [...].

A Conceptual Model of Home-Based Cardiac Rehabilitation Exercise Adherence in Patients with Chronic Heart Failure: A Constructivist Grounded Theory Study

Purpose

This study aimed to explore a conceptual model of home-based cardiac rehabilitation exercise adherence and reveal its internal behavioral logic.

Patients and Methods

A constructivist grounded theory design was adopted to explore the conceptual model of home-based cardiac rehabilitation exercise adherence. Semi-structured interviews were completed to collect qualitative data for constructing the conceptual model. The theoretical saturation and validation strategies were adopted to demonstrate the adequacy of qualitative data. A three-level coding procedure with constant comparisons was completed to analyze this qualitative data.

Results

A total of 21 patients with chronic heart failure were recruited in this study. As a result of this study, 32 initial codes, 12 category codes, and four core categories were extracted, namely, seeking supports, rehabilitation exercise, exercise monitoring and information feedback. According to the internal behavioral logic, the conceptual model of home cardiac rehabilitation exercise adherence was finally formed. In this closed-chain model, seeking supports is the initial adherence behavior, and rehabilitation exercise is the core adherence behavior, and exercise monitoring is the key adherence behavior, and information feedback is the driving adherence behavior.

Conclusion

The conceptual model of home-based cardiac rehabilitation exercise adherence in patients with chronic heart failure was developed, revealing its internal behavioral logic and providing theoretical references for developing relevant clinical research tools with comprehensive coverage and identifying weak links.

Prognostic Impact of Hybrid Comprehensive Telerehabilitation Regarding Diastolic Dysfunction in Patients with Heart Failure with Reduced Ejection Fraction—Subanalysis of the TELEREH-HF Randomized Clinical Trial

Aims: The objective of the study was to evaluate the effects of individually prescribed hybrid comprehensive telerehabilitation (HCTR) implemented at patients’ homes on left ventricular (LV) diastolic function in heart failure (HF) patients. Methods and results: The Telerehabilitation in Heart Failure Patients trial (TELEREH-HF) is a multicenter, prospective, randomized (1:1), open-label, parallel-group, controlled trial involving HF patients assigned either to HCTR involving a remotely monitored home training program in conjunction with usual care (HCTR group) or usual care only (UC group). The patient in the HCTR group underwent a 9-week HCTR program consisting of two stages: an initial stage (1 week) conducted in hospital and the subsequent stage (eight weeks) of home-based HCTR five times weekly. Due to difficulties of proper assessment and differences in the evaluation of diastolic function in patients with atrial fibrillation, we included in our subanalysis only patients with sinus rhythm. Depending on the grade of diastolic dysfunction, patients were assigned to subgroups with mild diastolic (MDD) or severe diastolic dysfunction (SDD), both in HCTR (HCTR-MDD and HCTR-SDD) and UC groups (UC-MDD and UC-SDD). Changes from baseline to 9 weeks in echocardiographic parameters were seen only in A velocities in HCTR-MDD vs. UC-MDD; no significant shifts between groups of different diastolic dysfunction grades were observed after HCTR. All-cause mortality was higher in UC-SDD vs. UC-MDD with no difference between HCTR-SDD and HCTR-MDD. Higher probability of HF hospitalization was observed in HCTR-SDD than HCTR-MDD and in UC-SDD than UC-MDD. No differences in the probability of cardiovascular mortality and hospitalization were found. Conclusions: HCTR did not influence diastolic function in HF patients in a significant manner. The grade of diastolic dysfunction had an impact on mortality only in the UC group and HF hospitalization over a 12–24-month follow-up in HCTR and UC groups.