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Related Concept Videos

Non-ohmic Devices00:51

Non-ohmic Devices

In most substances, the current flow is proportional to the voltage applied to it. A simple relationship between the values of current, voltage, and resistance is known as Ohm's law. Nonohmic devices do not exhibit a linear relationship between voltage and current. One such device is the semiconducting circuit element known as a diode. A diode is a circuit device that allows current flow in only one direction.
Consider a simple circuit consisting of a battery, a diode, and a resistor. A diode...
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Errors occurring during blood pressure monitoring

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Pulse rhythm01:30

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Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac muscle...
Control Systems01:10

Control Systems

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At the heart...
Control System Problem01:21

Control System Problem

In an open-loop system, such as a basic thermostat, the poles of the transfer function influence the system's response but do not determine its stability. However, when feedback is introduced to form a closed-loop system, such as an advanced thermostat that adjusts heating based on room temperature, stability is governed by the new poles of the closed-loop transfer function.
When forming a closed-loop system, issues can arise if the poles cross into the unstable region, leading to potential...
Ammeter01:11

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An ammeter is a current measuring instrument. In the circuit, it is represented by the symbol A. The ammeter is placed in series with the device or component to measure the current. A series connection is used because objects in series have the same current passing through them. If a circuit has multiple resistors and the current needs to be measured in each resistor, the number of ammeters required depends on whether the circuit is in series or parallel.
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Methodology for Establishing a Community-Wide Life Laboratory for Capturing Unobtrusive and Continuous Remote Activity and Health Data
11:21

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Is the device working properly?

Matthew Ortman1

  • 1Division of Cardiology, Department of Internal Medicine, Cooper Medical School of Rowan University, Camden, NJ 08103, USA. ortman-matthew@cooperhealth.edu

Journal of Electrocardiology
|July 20, 2012
PubMed
Summary
This summary is machine-generated.

Normal pacemaker and defibrillator function can appear as malfunctions. Understanding device timing and pacing algorithms helps avoid confusion with implanted cardiac devices.

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Area of Science:

  • Cardiology
  • Biomedical Engineering

Background:

  • Pacemakers and implantable cardioverter-defibrillators (ICDs) are crucial for managing cardiac arrhythmias.
  • Device function relies on complex timing cycles and algorithms tailored by manufacturers.

Observation:

  • Normal pacemaker activity can be misinterpreted as device malfunction.
  • Standard defibrillator operations may present as anomalies during routine checks.

Findings:

  • A deep understanding of cardiac device timing is essential for accurate interpretation.
  • Familiarity with manufacturer-specific pacing algorithms aids in distinguishing normal function from errors.

Implications:

  • This knowledge can prevent unnecessary device reprogramming or replacement.
  • Improved diagnostic accuracy enhances patient care and reduces healthcare costs.