Feasibility and acceptability of a self-measurement using a portable bioelectrical impedance analysis, by the patient with chronic heart failure, in acute decompensated heart failure.

Chronic heart failure (CHF) is a major public health matter. Mainly affecting the elderly, it is responsible for a high rate of hospitalization due to the frequency of acute heart failure (ADHF). This represents a disabling pathology for the patient and very costly for the health care system. Our study is designed to assess a connected and portable bioelectrical impedance analysis (BIA) that could reduce these hospitalizations by preventing early ADHF. METHODS: This prospective study included patients hospitalized in cardiology for ADHF. Patients achieved 3 self-measurements using the BIA during their hospitalization and answered a questionnaire evaluating the acceptability of this self-measurement. The results of these measures were compared with the clinical, biological and echocardiographic criteria of patients at the same time. RESULTS: Twenty-three patients were included, the self-measurement during the overall duration of the hospitalization was conducted autonomously by more than 80% of the patients. The acceptability (90%) for the use of the portable BIA was excellent. Some correlations were statistically significant, such as the total water difference to the weight difference (p=0.001). There were common trends between the variation of impedance analysis measures and other evaluation criteria. CONCLUSION: The feasibility and acceptability of a self-measurement of bioelectrical impedance analysis by the patient in AHF opens up major prospects in the management of monitoring patients in CHF. The interest of this tool is the prevention of ADHF leading to hospitalization or re-hospitalizations now requires to be presented by new studies.

Takotsubo cardiomyopathy associated with diving.

Takotsubo cardiomyopathy consists of cardiomyopathy with transient apical ballooning and left ventricular systolic dysfunction in the absence of atheromatous disease of the coronary arteries, accompanied by ECG changes together with elevated cardiac enzymes appearing in a context of emotional or physical stress. A 51-year-old woman was referred to our emergency department for treatment after chest pain associated with acute dyspnoea during diving. On questioning, the patient confirmed that she had twice dived to 35 m without any missed decompression stops and informed us that she had experienced tightening of the chest followed by sudden dyspnoea during her second ascent in a setting of marked emotional stress since the previous evening. Her ECG showed inverted T-waves in DI, aVL, V1 and V2, whereas chest radiographs revealed bilateral infiltration of the lower half of the lung fields and a globular heart. Laboratory tests revealed: troponin Ic 7.49 µg/l, myoglobin 206 µg/l, creatine phosphokinase 341 IU/l and N-terminal prohormone brain natriuretic peptide 7919 ng/l. Echocardiography performed in the emergency department showed left ventricular hypokinesia in the medioapical segment with an appearance of apical ballooning, hyperkinesia of the basal portion and a left ventricular ejection fraction of 35%. Coronary angiography revealed healthy coronary arteries. In conclusion, diagnosis of takotsubo cardiomyopathy is based on the guidelines issued at a consensus conference of the Idiopathic Cardiomyopathy Research Committee. This case shows the possibility of this syndrome occurring while diving.