Tag: ECG
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The Role of Temperature Sensors in Modern Biomedical Instruments
One of the most crucial parameters in healthcare is the temperature. Since a basic temperature sensor could be used in monitoring a fever, or a highly sophisticated surgical device, the applications of a temperature sensor are crucial components of contemporary biomedical equipment. Proper body temperature measurements enable clinicians to identify infections and direct treatments as…
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Features of an ECG Wireless Telemetry System
The advancement in technology has made it possible where necessary to monitor subjects from some distance using wireless telemetry. The biological parameter commonly studied this way is the electrocardiogram. The display of ECG and cardiac rates gives enough information on the loading of the cardiovascular system of the active subjects. In this article, we discuss…
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Features of Microprocessor-Based ECG Systems
Microprocessors have been used in electrocardiographs to obtain certain advanced features like the elimination of artefacts, baseline shifting, and so forth using software techniques. In this article, we look at some of the key features of microprocessor-based ECG systems as follows: Microprocessor-based ECG machines can perform self-testing each time they are switched on. They are…
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3 Common Causes of Anomalies in ECG Recordings
Irregular patterns of ECG may be caused by either pathological states or at times artefacts. Undesirable presence of artefacts on ECG trace may be due to the following: Interference from the Power Line This interference may be caused by the stray effect of the alternating current on the subject under measurement or because of alternating…
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Key Features of Modern ECG Systems
Modern diagnostic and monitoring ECG acquisition and analysis systems are equipped with modern-day computer technology. ECG monitoring devices constitute an important part of the patient monitoring systems. Patient monitoring systems are used to continuously or intermittently measure the vital signs (ECG, heart rate, pulse rate, blood pressure and temperature) and perform automatic analysis on them.…
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The Instrumentation for Recording ECG Signals
Since the electrical events in the normal heart precede its mechanical function, ECG signals play an important role in diagnosis and monitoring of a wide variety of cardiac abnormalities including myocardial infarction and chamber enlargements. Hence, ECG signal acquisition systems are extensively employed in cardiology, cardiac catheterization laboratories, intensive and cardiac care units, etc. The…
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Cardioverter Operation & Biomedical Application
When an operator applies an electric shock of the magnitude of that from a dc defibrillator to the patient’s chest during the T wave of the ECG, there is a strong risk of producing ventricular fibrillation in the patient. Because the most frequent use of defibrillation is to terminate ventricular fibrillation, this problem does not…
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ECG Electrodes
A typical flexible ECG electrode is composed of certain types of polymers or elastomers that are made electrically conductive by the addition of fine carbon or metal powder. These electrodes are available with pre-pasted AgCl gel for quick and easy application on the skin using double-sided peel off adhesive type. Related: Electrocardiogram (ECG) The common…
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Principle Parts and Types of ECG Recorders
Building Blocks of an ECG System In Electrocardiography (ECG) recorder five leads from the patient are connected to the ECG recorder through a selector switch to obtain 12 lead configurations as illustrated below: A standard voltage of 1 mV is used to calibrate the recorder. The output from the lead selector switch is amplified using…
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Key Factors to Consider in the Design and Operation of Electrocardiograph
There are various factors that must be considered in the design and application of the electrocardiograph. These key factors must be considered by the biomedical engineer as well as the electrocardiograph operator and the physician who interprets the recorded information. We discuss these factors as follows: Frequency distortion The electrocardiograph does not always meet the…