• cardiac care unit;
  • cardiovascular disease;
  • earplugs and eyeshield;
  • insomnia;
  • nurses;
  • nursing;
  • percutaneous transluminal coronary angiography;
  • sleeping;
  • South Korea

Aim and objective.  The study compared the effect of earplug-delivered sleep-inducing music on sleep in persons with percutaneous transluminal coronary angiography in the cardiac care unit.

Background.  Diverse types of music have been claimed to improve sleeping elsewhere, but relatively little is known in South Korea. Most studies investigating the effect of sleep-inducing music on sleep have involved persons with insomnia, even though many persons with cardiovascular disease in the intensive care unit suffer from sleeping problems. There is a need to investigate the effect of sleep-inducing music on sleep disorders in persons with percutaneous transluminal coronary angiography in the cardiac care unit.

Design.  An experimental research design was used.

Methods.  Data collection was conducted in the cardiac care unit of K University Hospital in D city, from 3 September–4 October 2010. Fifty-eight subjects participated and were randomly assigned to the experimental group (earplug-delivered sleep-inducing music for 52 min beginning at 10:00 pm, while wearing an eyeshield, n = 29) and the control group (no music, but earplugs and eyeshield worn, n = 29). The quantity and quality of sleep were measured using questionnaires at 7 am the next morning for each group.

Results.  Participants in the experimental group reported that the sleeping quantity and quality were significantly higher than control group (t = 3·181, p = 0·002, t = 5·269, p < 0·001, respectively).

Conclusion.  Sleep-inducing music significantly improved sleep in patients with percutaneous transluminal coronary angiography at a cardiac care unit. Offering earplugs and playing sleep-inducing music may be a meaningful and easily enacted nursing intervention to improve sleep for intensive care unit patients.

Relevance to clinical practice.  Nurses working at cardiac care unit can use music to improve sleeping in clients with percutaneous transluminal coronary angiography.