- published: 14 Mar 2016
- views: 1737
In medicine, a Holter monitor (often simply "Holter" or occasionally ambulatory electrocardiography device) is a portable device for continuously monitoring various electrical activity of the cardiovascular system for at least 24 hours (often for two weeks at a time). The Holter's most common use is for monitoring heart activity (electrocardiography or ECG), but it can also be used for monitoring brain activity (electroencephalography or EEG). Its extended recording period is sometimes useful for observing occasional cardiac arrhythmias or epileptic events which would be difficult to identify in a shorter period of time. For patients having more transient symptoms, a cardiac event monitor which can be worn for a month or more can be used.
The Holter monitor is named for physicist Norman J. Holter who invented telemetric cardiac monitoring in 1949. Clinical use started in the early 1960s.
When used for the heart, much like standard electrocardiography the Holter monitor records electrical signals from the heart via a series of electrodes attached to the chest. Electrodes are placed over bones to minimize artifacts from muscular activity. The number and position of electrodes varies by model, but most Holter monitors employ between three and eight. These electrodes are connected to a small piece of equipment that is attached to the patient's belt or hung around the neck, and is responsible for keeping a log of the heart's electrical activity throughout the recording period.
Walking in the streets alone
Eyes are open, I wanna go home
No money and not a plan this time
My happiness broke up, my fun time dies
Looking for anything to sooth
You'll never find
When all your plans heve falled and you're sad
I sit and cry
I am down
It's so damn late, the bus won't pass by
I'll be standing here all night
I ask myself why it all went wrong
But there's no answer, why ask? I'm dumb
I don't remember where they used to go
They all disappeared and I just don't know