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Related Concept Videos

Pulse rhythm01:30

Pulse rhythm

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...
Holter Monitor: 24-Hour Monitoring01:23

Holter Monitor: 24-Hour Monitoring

Holter monitoring is a continuous electrocardiography (ECG) recording that tracks the heart's electrical activity over an extended period, generally 24 to 48 hours. This noninvasive diagnostic tool detects irregular heart rhythms that may not be captured during a standard ECG performed in a clinical setting.DeviceThe Holter monitor is a portable, small device connected to several electrodes on the patient's chest. These electrodes detect the heart's electrical signals and transmit them to the...
ECG Interpretation of Rhythms01:24

ECG Interpretation of Rhythms

An electrocardiogram (ECG)graphically represents the heart's electrical activity on ECG paper or a monitor.
Components of the Electrocardiogram
The primary components of a normal ECG waveform in Normal sinus rhythm(NSR) include the P wave, PR interval, QRS complex, ST segment, T wave, and occasionally a U wave.
ECG waveforms are divided by vertical and horizontal lines at standard intervals.
The horizontal axis measures time and rate, and the vertical axis measures amplitude or voltage. When...
Electrocardiogram01:29

Electrocardiogram

An electrocardiogram (ECG or EKG) is a critical diagnostic tool that records the electrical signals produced by the heart during each heartbeat. This recording is achieved through electrodes placed strategically on the arms, legs, and chest. The electrocardiograph amplifies these signals and produces 12 distinct tracings, offering a comprehensive understanding of the heart's electrical activity.
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and the T...
Equipments Used To Measure Blood Pressure01:30

Equipments Used To Measure Blood Pressure

Direct Method
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...
Special considerations while measuring pulse01:13

Special considerations while measuring pulse

Assessing a patient's pulse is a fundamental skill in healthcare, but certain situations require special attention:

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Related Experiment Video

Updated: Jul 10, 2026

Calculating Heart Rate Variability from ECG Data from Youth with Cerebral Palsy During Active Video Game Sessions
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Heart rate detection from an electronic weighing scale.

R González-Landaeta1, O Casas, R Pallàs-Areny

  • 1Instrumentation, Sensors and Interface Group, Universitat Politècnica de Catalunya, Castelldefels, Barcelona, 08860, Spain. rgonzalez@eel.upc.edu

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
|November 16, 2007
PubMed
Summary
This summary is machine-generated.

A novel technique uses a common electronic weighing scale to detect heart rate by sensing blood acceleration. This non-contact method requires no body sensors and achieves high accuracy, with errors as low as +/-0.6 beats/minute.

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Area of Science:

  • Biomedical Engineering
  • Physiological Monitoring

Background:

  • Traditional heart rate monitoring often requires wearable sensors.
  • Existing methods may be uncomfortable or impractical for continuous monitoring.

Purpose of the Study:

  • To introduce a non-contact heart rate detection method using a standard electronic weighing scale.
  • To assess the feasibility and accuracy of this novel approach.

Main Methods:

  • Utilized force variations from blood acceleration in the aorta, detected by a weighing scale.
  • Developed a pulse detection system with off-the-shelf integrated circuits.
  • Validated the method by simultaneously recording ECG and force signals in 12 volunteers.

Main Results:

  • Weighing scales demonstrated suitable sensitivity (490–1670 nV/V/N) and frequency response for heart rate estimation.
  • The developed system sensed force variations as low as 240 mN with a high signal-to-noise ratio (>48 dB).
  • Maximal heart rate error between the scale method and ECG was +/-0.6 beats/minute.

Conclusions:

  • This non-contact weighing scale technique offers a practical and accurate method for heart rate detection.
  • The system is effective even with footwear and eliminates the need for body-attached sensors.
  • This technology has potential for unobtrusive, everyday physiological monitoring.