As showed a new research, only one night without dream is enough to cause a strain of a cardiac muscle, forcing heart even to work for about 10 percent more intensively next day.
To people who work, for example, in the Ministry of Emergency Situations in service of emergency medical service or are engaged in other professions with the high level of a stress, often it is necessary to carry out the functional duties day and night when opportunities for a dream and rest are limited.
It is known that the strong fatigue exerts impact on many physical, cognitive and emotional processes, but this research became the first where scientists study how round-the-clock work without dream influences specifically work of heart.
“For the first time we showed that the short-term sleep debt bound to hard round-the-clock work can enlarge considerably contractility of a cardiac muscle, arterial pressure and heart rate” — the principal of a research doctor Daniel Kyotting from University of Bonn in Germany says.
20 doctors radiologists with good shape of health, including 19 men and one woman whose average age made 31,6 years participated in a research. Work of their cardiovascular system was checked till a 24-hour shift when duration of a dream was about three hours.
Researchers measured a cordial load, arterial pressure and heart rate.
After a sleep debt at participants the appreciable strain of a cardiac muscle when heart had to work for about 10 percent more intensively, than usually became perceptible. Besides, they considerably enlarged the level of the tireostimuliruyushchy hormone and a hydrocortisone developed by an organism in response to a stress.
“The research was conducted for studying of influence in real life of the sleep deficit bound to hard work” — doctor Kyotting added.
“When people are forced to work more longly usual or at several works to make ends meet, it is very important to study harmful consequences of too hard work and a sleep debt”.
According to Kyottinga, results of this pilot study which were presented at an annual conference of Radiological society of North America can be expanded also on other professions where often it is necessary to work long hours without rest.
“These results can help us to understand better how the working load and duration of a shift influence the state of health of the population” — he told.
Earlier scientists bound a dream disadvantage to such factors as a metabolic disorder and the increased hydrocortisone level which can lift arterial pressure and enlarge risk of a stroke.
In 2010 researchers of University of Uorvik found out that at people who sleep every night less than six hours chances of premature death — before achievement of age of 65 years — were 12 percent more, than at those who sleep the recommended six-eight hours a day.
But too long dream is also bound to ill health and the increased risk of early death.
The research showed that the dream facilitates recovery of the forgotten information on particles which, perhaps, got lost somewhere in depths of a human brain.
In situations when people forgot information within 12 hours of wakefulness, after a full-fledged night dream they could remember forgotten approximately twice more often, scientists from University of Exeter found.