Nt1310 Unit 1 Exercise 1

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2. EXISTING SYSTEM:
QRS complex is the most striking feature in an ECG signal and corresponds to the depolarization of ventricles in the heart. The position, duration and the amplitude of a QRS complex helps the physician to diagnose cardiac ailments correctly. It is difficult to identify problems in heart, just by monitoring the heart rhythm for an hour or two when the patient is in the clinic. In order to achieve this, holter monitors are used to record the ECG data for long duration, i.e. 24 hours.
1. The first approach is iterative, i.e. the threshold for the next peak detection was calculated as a percentage of the previously detected peak.
2. The second approach involved the calculation of threshold based on the mean of a number of peaks detected …show more content…
• Investigating EKG changes with mild stimulants.
• Determine the axis of the heart.

Connecting the EKG Sensor to a Person: Use three electrode patches per subject. The electrodes can be reused, but they tend to absorb moisture (they are very hygroscopic) and, therefore, reuse is not recommended. Fig 11 connecting EKG sensor
• Because the electrical signal produced by the heart and detected at the body’s surface is so small, it is very important that the electrode patch makes good contact with the skin. Scrub the areas of skin where the patches will be attached with a towel to remove dead skin and oil.
• Peel three electrode patches from the backing paper. Firmly place the first electrode on the right wrist.
• Place a second electrode on the inside of the right elbow.
• Place a third electrode on the inside of the left elbow.
• Place each electrode so it is on the inside part of the arm (closer to the body) and the tab on the edge of the electrode patch points down. This way, the wire of the sensor can hang freely without twisting the edge of the electrode patch.
• Connect the micro alligator clips from the sensor to the tabs on the edges of the electrode
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