Electrocardiography (ECG) and working test
The heart pumps regular blood around the body. This pump function should not brains "to think", since it is controlled directly from a point of the heart, calledsinusknuden.
Sinusknuden emits an electrical impulse that spreads across the heart and cause it to pull even and rhythmic together. See more in heart rhythm regulation.
Using electrodes, it is possible to detect cardiac electrical impulses. In an ECG reading placed electrodes on the arms and legs, and the chest around the heart. Pulse of the heart will then give different result from the different electrodes, and the readings can be positive or negative and change while I'm in love. The result is the classic ECG transcript, which can be viewed on a screen or printed directly onto paper.
An ECG measurement is not dangerous and does not hurt.
ECG studies are very informative and widely used investigation. It is used in the diagnosis of most cardiac diseases, including:
- Rhythm Disturbances.
- Crane artery diseases, heart spasms and blood clots in the heart.
- The overload of the heart included. heart failure.
It may sometimes be necessary to ECG monitor patients for 24 hours at a time, so-calledHolter monitoring. This can be done at the hospital, or in some cases in the home where the patient has a small ECG machine home.
ECG measurement is also used in connection with a so-called load and working tests. Since some heart diseases, for example. heart spasms, only appears when the heart is loaded (in physical work), it may be necessary to let the disease run on a running or cycling on a kondicykel while ECG measurement is made. In this study, there is always a doctor present, and the investigation halted the moment the patient feels discomfort, or EKG'et shows changes.
Since no medication can affect EKG'et, it is important to tell your doctor what medicines you take in the ECG study.
With an X-ray, the physician may see if the heart is enlarged because of congestion or whether there is fluid in the void between the heart and heart sac.
Ultrasound Examination of the heart (echocardiography)is a widely used study and described in a separate article.
By injecting a radioactive substance, which is only absorbed by heart muscle cells, it can be a gamma camera (which captures particles from radioactive tracers) see parts of the heart muscle that does not work (not record the substance). By narrowed coronary arteries, some heart cells could incorporate the substance of the rest (there will be enough blood through åren), but not during work where there is anemia, and trace element can not come up. Scientigrafi used often, when a working test does not give a tyd
For those who can not cope with a physical load, you can inject a substance that expands crane pulse arteries and thus at heart, as if we did physical work.
PET (Positron EmissionsTomografi)
Based on the same principles as above. You can feel the different substances, and thus give an impression of cardiac blood flow, blood sugar removals, heart energy trading mm.
The technique used to assess whether heart cells are dead, alive or in "sleep" when they know more oxygen (opening of coronary artery) can be expected to act again.
MRI (magnetic resonance imaging)
Used mainly to form a picture of cardiac structure and is particularly advantageous for diagnosis of congenital heart malformations in children.
CAG (Coronary artery Angiorafi)
By spraying a røntgentæt tracer (substance lights up on an X-ray) into the crane pulse years (coronary artery), on an X-ray to see where there are constrictions. This procedure is cumbersome, however, since it requires a plug in the groin and introduction of a thin catheter from the heart arteries. The study is carried out almost exclusively in connection with the simultaneous ballonudvidelse of coronary artery (PCI), where entry is the same sport.
This article is formed on the Health Guide on 01.09.06