How does ECG Electro Cadio Gram Work? How do doctors able to read graphical image?

Answer 1

The ECG (or EKG as it was originally called in germany) traces the electrical impulses occuring in the heart. All of the energy comes from the patient, not the machine, for the machine only records the impulses. Changes in voltage register as movements up and down on a graph paper containing tiny boxes to measure the degree of deflection.

The heart works by sending a little current from the natural pacemaker in the right atrium down the electrical pathway to the heart muscle to make it contract and pump. Damage to the heart muscle, due to clots, scar tissue or other conditions change the normal transmission and can be seen on the EKG.

The standard 12 lead EKG consists of Leads I,II, and III, avl, avr, avf, and v1, v2, v3, v4, v5, and v6. The represent different directions of the "spark" travelling through the heart. A doctor can tell where a problem exists in the heart by which leads are not normal. There are other special EKG's , like the signal-average EKG and some using extra electrodes, but the 12 lead is the most common. To obtain it, 10 electrodes are connected to the patient: on each arm and leg and six leads on the chest in the older machines. Modern machines can get the same results with fewer electroded.

The electrical impulse in converted into movement which marks the EKG strip and this is then read by the physician. It indicates the heart rate and rhythm as well as whether the pathways are normal or not.

Answer 2

The EKG (it's actually an ECG but most commonly referred to as the former) gives a remarkable amount of valuable information for such a quick and non-invasive test. Basically, in laymans terms, the EKG picks up on electrical impulses within the heart, which can identify any reduced activity in parts of the heart, primarily reduced blood flow. If one has had a heart attack, there would be a portion of the heart which is not receiving electrical stimulation because a part of the heart muscle dies if one has had a heart attack. The test will also pick up on portions of the heart that have reduced activity, which is sometimes associated with reduced blood flow caused by ischemia (blockage in one or more of your coronary arteries) Most ECG tests are done with high tech equipment that actually does the interpretation for the doctor.

Answer 3

Electrocardiogram
An Electrocardiogram (EKG or ECG) records the electrical activity of the heart from the surface of the chest using electrodes placed on each arm and leg and six placed on the chest. These electrodes are connected by wires to an EKG machine. 12 different tracings are produced and this is called a 12 lead EKG. Each tracing gives a view of the heart from a different angle. The 12 leads of an EKG are called I, II, III, aVR, aVL, aVF, and V1, V2, V3, V4, V5, and V6. Depending on which EKG lead is involved, your physician can tell during a heart attack which part of the heart it is occurring in. Then, based on his knowledge of anatomy, he can determine which artery is blocked.
The EKG gives the physician information about :
heart rate
heart rhythm
adequacy of blood supply to the heart
presence of a heart attack
enlargement of the heart
inflammation around the heart (pericarditis)
effects of drugs and electrolytes on the heart.
Please see the webpages for more details on ECG.

Answer 4

In medical school they had to take notes really fast. Becoming a doctor is not that easy now, The speed of their writing messep up their handwriting And they don't care about it after becoming a doctor.

Answer 5

Look it up on the net. The BASICS are simple and can be taught to any intelligent 13 year old in about 2 hours. More advanced analysis would take several days to learn.

Answer 6

Read the wiki page