Publications by authors named "Masachika Tamura"
Background: Recently, sleep disordered breathing (SDB) has gained attention in the field of cardiology. Until now, no study describing the relationship between acute coronary syndrome (ACS) and SDB has been carried out in Japan.
Methods: Among ACS patients admitted to our hospital, 44 patients (mean age 60.
Sleep-disordered breathing (SDB) is frequently observed in patients with congestive heart failure. Recent studies have shown that SDB negatively affects the onset of congestive heart failure; however, no studies have addressed the relationship between the level of SDB and the onset time of acute dyspnea. We hypothesized that SDB affects the acute onset time of dyspnea (AOT) and investigated the relationship between SDB and AOT.
View Article and Find Full Text PDFPrevious studies have reported that skeletal muscle strength is closely related to exercise capacity in patients with myocardial infarction (MI). However, none of the previous studies have fully investigated the correlation between exercise capacity and the skeletal muscle volume (MV). Seventy patients with MI underwent symptom-limited cardiopulmonary exercise testing using a treadmill.
View Article and Find Full Text PDFArticle Synopsis
- The study aimed to assess the impact of illness severity on health-related quality of life (HRQOL) in patients with chronic heart failure (CHF) and compare it to a normal Japanese population.
- It involved 125 stable CHF patients, focusing on measures like peak oxygen uptake and the medical outcome study short form-36 (SF-36) for HRQOL assessment.
- Results showed that as the severity of CHF increased (indicated by the NYHA functional class), both HRQOL and peak oxygen uptake declined, indicating poorer health outcomes for CHF patients compared to the general population.
A 66-year-old man had a progressive increase in the pacing threshold over a one-year period, resulting from chronic myocarditis. Following steroid therapy, the pacing threshold decreased and became stabilized, and was accompanied by a decrease in the serum creatine kinase, cardiac myosin light chains and pro-collagen III peptide values, but cardiac function did not improve. Endocardial biopsy showed that there was no progression in the fibrosis.
View Article and Find Full Text PDFObjectives: To develop a measure for disease-specific health-related quality of life in patients with heart failure and examine its reliability and validity.
Methods: One hundred and four patients with stable chronic heart failure (74 males, 30 females, mean age 64.2 +/- 10.
The present study was undertaken to investigate the relationship between the extent of impaired chronotropic response and cardiac output during exercise, and exercise tolerance in patients with chronic heart failure. The subjects consisted of 24 patients (mean 60.1 +/- 14.
View Article and Find Full Text PDFObjectives: This study investigated whether myocardial infarction patients with diabetes mellitus had lower heart rate reserve to exercise by measuring the increment in heart rate (HR) divided by the increment of norepinephrine (NE) concentration from rest to peak exercise (delta HR/log delta NE). The difference in exercise training effects was also investigated.
Methods: The 148 patients after myocardial infarction were divided into two groups, the DM group (n = 34) and the non-DM group (n = 114).