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This will help make a good connection (hair is not a good conductor). Prep and clean the area you plan to stick pads.The pads loose the ability to pass signals with multiple applications. Try to use fresh pads for each measurement.Try not to move too much while taking a measurement.Make sure the RA and LA sensor pads are on correct sides of the heart.Keep sensor pads as close to the heart as you can.
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So here are some simple tips to improve the signal quality. These are commonly referred to as " Motion Artifacts". The furtherthe sensor pads are from the heart, the more muscle noise you will see. This is because you are measuring muscle activation. This relaxation phase resets the ventricles to be filled again by the atriums.ĮCG's are notoriously noisy.
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Finally the T wave becomes present to actively "re-ploarize", or relax the ventricles. The ST segment is fairly quiet electrically as it is the time where the ventricals waiting to be "re-polarized".
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After the initial contraction comes the ST segment. Science, Again! The left ventricle is also begining to pump freshly oxygenated blood through the aorta and into the rest of the body. They are still called arteries because arteries carry blood away the heart. The pulmonary arteries are blue in the diagram because they are carrying deoxygenated blood. The right ventricle begins to pump deoxygenated blood into the lungs through the left and right pulmonary arteries. During QRS both ventricles begin to pump. The QRS is a complex process that generates the signature "beep" in cardiac monitors. The QT Interval is where things get really interesting. They are still called veins because veins carry blood towards the heart. The pulmonary veins are red in the diagram because they are carrying oxygenated blood. The left atrium is responsible for receiving newly oxygenated blood from the lungs into the left ventricle via the left and right pulmonary veins. As the electrical impulse travels across the top of the heart it then triggers the left atrium to contract. This forces it to contract and drain deoxygenated blood from both the Superior and Inferior vena cava into the right ventricle. This electrical impulse causes the chambers to "depolarize". The right atrium is the first chamber to see an electrical impulse. The PR interval is the initial wave generated by an electrical impulse traveling from the right atrium to the left.
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