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Marina Ferrari

Publications and source records attributed to Marina Ferrari.

4 recordsLinked to original sources
PubMed2006

Home telemonitoring of vital signs and cardiorespiratory signals in heart failure patients: system architecture and feasibility of the HHH model.

BACKGROUND: The Home or Hospital in Heart Failure Study (HHH) is a European Community funded trial (QLGA-CT-2001-02424) which compares usual care of heart failure (HF) with three home-based interventions in a multicenter, multicountry (Italy, Poland and UK), randomized controlled clinical trial. Home telemonitoring (HT) of clinical parameters represents a potential alternative (or addition) to traditional home care models. Nocturnal respiratory disorders (periodic breathing, sleep apnea) are very common in HF, and are associated with increased morbidity and mortality. We developed an integrated HT system for monitoring of both vital signs and respiration. All measurements were patient-managed. This paper describes the architecture of this system, and assesses its feasibility. METHODS AND RESULTS: 461 clinically stable patients were randomized first to usual vs home-monitored care; the latter were further randomized to 3 strategies. Over a 12-month follow-up 2 of these 3 groups (195 patients, age: 60+/-11 years, NYHA class II-III: 97%, LVEF 28+/-7%) underwent self-administered home monitoring of vital signs (weekly--12 parameters using an interactive voice response system) and respiration (monthly--24-hour recording). Data were transmitted over conventional telephone lines; 81% of actually practicable vital signs measurements were completed by the patients (range: 75% (PL)-93% (UK)), as well as 92% of practicable respiratory recordings (range: 85% (PL)-99% (UK)). 87% of nighttime recordings were eligible for the study (good quality signals for > or = 2.5 h). CONCLUSIONS: This study, the largest so far, demonstrates that self-managed home telemonitoring of both vital signs and respiration is feasible in HF patients, with surprisingly high compliance. We found an excellent rate of acceptable nocturnal respiratory recordings, which are those with the greatest clinical relevance.

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PubMed2002

Cost/utility ratio in chronic heart failure: comparison between heart failure management program delivered by day-hospital and usual care.

OBJECTIVE: This study compared the effectiveness and cost/utility ratio between a heart failure (HF) management program delivered by day-hospital (DH) and usual care in chronic heart failure (CHF) outpatients. BACKGROUND: Previous studies showed that about 50% of readmissions for CHF can be prevented by a multidisciplinary approach. However, the performance, effectiveness, and cost/utility ratio of a process of HF outpatient management related to evidence-based medicine have not been considered. METHODS: A total of 234 prospective patients discharged by a HF Unit were randomized to two management strategies: 122 patients to usual community care and 112 patients to a HF management program delivered by the DH. Management (rate of readmissions, therapeutic interventions), functional parameters (New York Heart Association [NYHA] functional class, left ventricular diameters, and ejection fraction, deceleration time of early diastolic mitral flow, peak oxygen uptake, and mitral regurgitation) and hard outcomes (cardiac death and urgent cardiac transplantation) were evaluated. The cost/utility ratios of the two strategies were compared. RESULTS: After 12 +/- 3 months of follow-up, the individual rate access in DH was 5.5 +/- 3.8 days. The DH subjects were readmitted to the hospital less frequently than were the usual-care group patients (13 vs. 78, p < 0.00001). Patients allocated to usual-care management showed heterogeneous changes in NYHA functional class (13% improved and 16% worsened p = NS); In contrast, the DH group showed significant changes in NYHA functional class (23% improved and 11% worsened, p < 0.009). Hard cardiac events in the one-year follow-up occurred in 25/234 (10.6%) patients; cardiac death occurred in 21/122 (17.2%) of the community group and in 3/112 (2.7%) in the DH group (p < 0.0007). One DH patient underwent urgent transplantation. Comparison of the two managerial models by Cox regression analysis showed that DH management significantly protected against the appearance of hard events (relative risk [RR] 0.17; confidence interval [CI] 0.06 to 0.66). The cost/utility ratio of the two management strategies was similar (usual care $2,409 vs. DH $2,244). The incremental analysis revealed a cost savings of $1,068 for each quality-adjusted life year gained. The cost/utility ratio for the integration of DH management of CHF was $19,462 (CI $13,904 to $34,048). CONCLUSIONS: A heart failure outpatient management program delivered by a DH can reduce mortality and morbidity of CHF patients. This management strategy is cost-effective and has an equitable value from a societal point of view.

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PubMed2002

[Home exercise therapy in chronic congestive heart failure: observational study of factors affecting adherence to the program].

BACKGROUND: Physical training has proven to be a valid and effective therapeutic tool capable of counteracting muscle changes that occur in chronic heart failure (CHF) patients. Nevertheless, few studies have analyzed the frequency of use of this therapy and the reasons for any reduced compliance and adherence to the prescription. The aim of this study was to quantify the frequency of the participation of CHF patients in a program of domiciliary physical training and to analyze the factors that can influence adherence to the program. METHODS: Three hundred and twenty-two consecutive CHF patients (ejection fraction 28 +/- 7%) in a stable condition with optimized medical therapy performed a cardiopulmonary test, including determination of peak oxygen consumption, at baseline and after 9 +/- 3 months. All the patients had participated in sessions of health education on the relationship between illness/physical activity. The prescription of physiotherapy was decided by the physician on the basis of each patient's clinical need assessed in the diagnostic-therapeutic management. The patient referred for physiotherapy entered a therapeutic strategy that included sessions of training on anaerobic threshold, self-management of the session, and formulation of a domiciliary physical training program. During the follow-up evaluation the patients were asked to complete a questionnaire, which investigated the relationship between several factors and the patient's adherence to the physical training program, which was objectively evaluated by the change in peak oxygen consumption recorded at the end of the training, taking into account the spontaneous variations found in the control group. RESULTS: Two hundred and eighty-two of the patients (88%) satisfied the criteria for inclusion in the study. Only 61 (22%) of them were judged to have adhered to the recommended physical training. Type of employment (chi 2 = 7.08, p < 0.02), the state of retirement (chi 2 = 8.9, p < 0.01), ischemic etiology (chi 2 = 5.91, p < 0.01), compatibility with employment (chi 2 = 15.8, p < 0.0004), availability of suitable domestic conditions (chi 2 = 14.5, p < 0.0008), the structure of the training program (chi 2 = 22.33, p < 0.0001) and a learning phase in a gym (chi 2 = 71.33, p < 0.0001) were significantly correlated at univariate analysis with the performance of the physical training. Multivariate analysis identified the structure of the training program (odds ratio 9.6, 95% confidence interval 2.8-33) and a learning phase in a gym (odds ratio 49.6, 95% confidence interval 11-210.8) as independent factors (r2 = 0.48) determining adherence to the physical training program. CONCLUSIONS: Adherence to unmonitored, recommended domiciliary physical training appears to be modest even in patients who have been in-patients in a cardiac rehabilitation center. Various factors seem to influence the adherence of the patient to this therapy, but structural factors, such as the organization and learning of the program, more strongly influenced the patient's subsequent compliance.

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