In Japan,
percutaneous coronary intervention (PCI) is a major therapeutic intervention
for ischemic heart disease (IHD). Previous studies suggested that an
association of the risk of IHD caused by sleep duration was related to factors
closely associated with daily activities. However, in Japan, there is no study
about this relationship objectively measured using the actigraphy in patients
with IHD. Moreover, there is little reported data about sleep condition and
early outcomes of patient’s Health-Related Quality of Life (QOL) after PCI.
This study determines the correlations between sleep conditions and QOL
(measured by SF36 version 2) of 25 patients with IHD who underwent elective
PCI. Data were collected seven days after PCI using night-sleep condition.
Using Spearman’s rank test, the results revealed positive correlation between
vitality score and longest sleep duration (ρ = 0.43, p = 0.031): social functioning (SF) score and duration of
night-time sleep (ρ = 0.42, p = 0.037);
total sleep duration (ρ = 0.45, p = 0.026),
and longest sleep duration (ρ = 0.44,
p = 0.024); mental health score and longest sleep duration (ρ = 0.54, p = 0.006). However, negative
correlation was found between physical functioning score and arousal during
sleep (ρ = -0.44, p = 0.027). Sleep
condition was significantly correlated with QOL. In particular, SF score was
positively related to night-time sleep. This seems to indicate that SF score
might be related to night-time sleep
condition. Moreover, the longest sleep durations were correlated with
the mental component summary. The results of the study suggest that not
only the length of whole sleep durations leads to better QOL, but also the increase the amount of uninterrupted sleep.