Survival analysis of patients with acute coronary syndrome receiving comprehensive coordinated care after myocardial infarction (KOS-Zawał)

Early Cardiac Rehabilitation Improves Carotid Arterial Stiffness in Patients with Myocardial Infarction

Background

Little is known about the effect of cardiac rehabilitation (CR) on carotid arterial stiffness (CAS) in patients with myocardial infarction (MI).

Patients and Methods

Rehabilitation group (B) included 90 patients with MI subjected to CR, control group (K) consisted of 30 patients with MI not participating in CR, and healthy group comprised 38 persons without cardiovascular risk factors. CAS was determined using echo-tracking before and after CR.

Results

At baseline, patients with MI (B+K) presented with significantly higher mean values of CAS parameters: beta-stiffness index (7.1 vs 6.4, p = 0.004), Peterson's elastic modulus (96 kPa vs 77 kPa, p < 0.001) and PWV-beta (6.1 m/s vs 5.2 m/s, p < 0.001) than healthy persons. Age (beta: r = 0.242, p = 0.008; EP: r = 0.250, p = 0.006; PWV-beta: r = 0.224, p = 0.014) and blood pressure: SBP (EP: r = 0.388, PWV-beta: r = 0.360), DBP (AC: r = 0.225) and PP (PWV-beta: r = 0.221) correlated positively with the initial parameters of CAS. Beta-stiffness index (Rho=-0.26, p = 0.04) and PWV-beta (Rho = 0.29, p = 0.03) correlated inversely with peak exercise capacity expressed in METs. After CR, mean values of beta-stiffness index (6.2 vs 7.1, p = 0.016), EP (78 kPa vs 101 kPa, p = 0.001) and PWV-beta (5.4 m/s vs 6.2 m/s, p = 0.001) in group B were significantly lower than in group K. In group B, CAS parameters decreased significantly after CR. Univariate analysis demonstrated that the likelihood of an improvement in CAS after CR was significantly higher in patients with baseline systolic blood pressure <120 mm Hg (OR = 2.74, p = 0.009) and left ventricular ejection fraction <43% (OR = 5.05, p = 0.005).

Conclusion

In patients with MI, CR exerted a beneficial effect on CAS parameters. The improvement in CAS was predicted by lower SBP and LVEF at baseline.

The Usefulness of Questionnaires in Assessing the Risk of Obstructive Sleep Apnea in Patients in the Managed Care after Acute Myocardial Infarction Program-The Results of a Cross-Sectional Study

Obstructive sleep apnea (OSA) worsens prognosis after myocardial infarction (MI) but often remains undiagnosed. The study aimed to evaluate the usefulness of questionnaires in assessing the risk of OSA in patients participating in managed care after an acute myocardial infarction program. Study group: 438 patients (349 (79.7%) men) aged 59.92 ± 10.92, hospitalized in the day treatment cardiac rehabilitation department 7-28 days after MI. OSA risk assessment: A 4-variable screening tool (4-V), STOP-BANG questionnaire, Epworth sleepiness scale (ESS), and adjusted neck circumference (ANC). The home sleep apnea testing (HSAT) was performed on 275 participants. Based on four scales, a high risk of OSA was found in 283 (64.6%) responders, including 248 (56.6%) based on STOP-BANG, 163 (37.5%) based on ANC, 115 (26.3%) based on 4-V, and 45 (10.3%) based on ESS. OSA was confirmed in 186 (68.0%) participants: mild in 85 (30.9%), moderate in 53 (19.3%), and severe in 48 (17.5%). The questionnaires' sensitivity and specificity in predicting moderate-to-severe OSA were: for STOP-BANG-79.21% (95% confidence interval; CI 70.0-86.6) and 35.67% (95% CI 28.2-43.7); ANC-61.39% (95% CI 51.2-70.9) and 61.15% (95% CI 53.1-68.8); 4-V-45.54% (95% CI 35.6-55.8) and 68.79% (95% CI 60.9-75.9); ESS-16.83% (95% CI 10.1-25.6) and 87.90% (95% CI 81.7-92.6). OSA is common in post-MI patients. The ANC most accurately estimates the risk of OSA eligible for positive airway pressure therapy. The sensitivity of the ESS in the post-MI population is insufficient and limits this scale's usefulness in risk assessment and qualification for treatment.

Comprehensive Cardiac Care: How Much Does It Cost?

The benefits of coordinating care between healthcare professionals and institutions are the main drivers behind reforms to the payment and delivery system for healthcare services. The purpose of this study was to analyse the costs incurred by the National Health Fund in Poland related to the comprehensive care model for patients after myocardial infarction (CCMI, in Polish: KOS-Zawał).

METHODS

The analysis involved data from 1 October 2017 to 31 March 2020 for 263,619 patients who received treatment after a diagnosis of first or recurrent myocardial infarction as well as data for 26,457 patients treated during that period under the CCMI programme.

RESULTS

The average costs of treating patients covered by the full scope of comprehensive care and cardiac rehabilitation under the programme (EUR 3113.74/person) were higher than the costs of treating patients outside of that programme (EUR 2238.08/person). At the same time, a survival analysis revealed a statistically significantly lower probability of death (p < 0.0001) in the group of patients covered by CCMI compared to the group not covered by the programme.

CONCLUSIONS

The coordinated care programme introduced for patients after myocardial infarction is more expensive than the care for patients who do not participate in the programme. Patients covered by the programme were more often hospitalised, which might have been due to the good coordination between specialists and responses to sudden changes in patients' conditions.

Comprehensive Care after Myocardial Infarction (CCMI): Long-Term Investment in the Health of Polish Citizens

The comprehensive care model after myocardial infarction (CCMI, in Polish: KOS-Zawał) has been in effect continuously since October 2017. Within the bundle of services financed by the Polish National Health Fund (NHF), patients receive a diagnosis, conservative and invasive treatment, early cardiac rehabilitation and follow-up visits for 12 months. The existing model of managing patients after myocardial infarction (MI) implements all crucial aspects of care recommended by the European Society of Cardiology (ESC), emphasised many times. The purpose of this paper was to report and describe the course of the implementation of the unique concept—CCMI model, including the scope of the introduced changes and the implementation and structural evaluation of its effects over the period 2017–2021. Our preliminary study reported that the CCMI programme reduces the risk of patient death in the first year after MI by 29%. Furthermore, the authors point out the strict cause and effect relationship between the cardiovascular disease prevention programme since 2004 as the key instrument for the primary systemic prevention implemented outside the CCMI model.