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Related Concept Videos

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Pulse rhythm

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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.
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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...
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Dysrhythmias V: Evaluating Dysrhythmias01:30

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Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...
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Epilepsy is primarily characterized by unpredictable seizures, either provoked by an identifiable factor, such as injury or illness, or unprovoked, occurring spontaneously without apparent cause.
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Equipments Used To Measure Blood Pressure01:30

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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...
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Dysrhythmias I: Introduction01:15

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Dysrhythmias refers to abnormalities in the heart's rhythm. They result from disruptions in the heart's electrical conduction system, which includes the sinoatrial(SA)node, atrioventricular(AV) node, the bundle of His, bundle branches, and Purkinje fibers.Definition and PathophysiologyDysrhythmias result from disorders of impulse formation, impulse conduction, or both. The heart contains specialized cells in the sinoatrial node, atrioventricular node, and the bundle of His and Purkinje fibers...
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Related Experiment Video

Updated: Mar 14, 2026

Multi-system Monitoring for Identification of Seizures, Arrhythmias and Apnea in Conscious Restrained Rabbits
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Loop recorders for syncope evaluation: what is the evidence?

Christopher C Cheung1, Andrew D Krahn1

  • 1a Heart Rhythm Vancouver, Division of Cardiology , University of British Columbia , Vancouver , BC , Canada.

Expert Review of Medical Devices
|October 4, 2016
PubMed
Summary
This summary is machine-generated.

Implantable loop recorders (ILRs) offer prolonged monitoring for diagnosing unexplained syncope. These insertable cardiac monitors (ICMs) improve symptom-rhythm correlation, increasing diagnostic yield in various patient groups.

Keywords:
ILRSyncopeevaluationimplantable loop recordersprolonged monitoring

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Area of Science:

  • Cardiology
  • Medical Devices
  • Diagnostic Technology

Background:

  • Implantable loop recorders (ILRs) are crucial for diagnosing unexplained syncope.
  • Modern insertable cardiac monitors (ICMs) provide extended, minimally-invasive monitoring.
  • ILRs have demonstrated high diagnostic yield in numerous studies.

Purpose of the Study:

  • To review the evidence supporting the use of ILRs in syncope evaluation.
  • To compare ILRs with conventional diagnostic methods and external loop recorders.
  • To discuss the role of ILRs in specific patient populations.

Main Methods:

  • Review of observational studies and randomized trials on ILRs.
  • Analysis of guideline recommendations for ILR use.
  • Comparison of ILR diagnostic yield with alternative monitoring strategies.

Main Results:

  • ILRs enable prolonged monitoring (years) for symptom-rhythm correlation.
  • Studies support ILRs for recurrent or high-risk unexplained syncope.
  • ILRs show varying success in elderly, pediatric, and cardiac patients.

Conclusions:

  • ILRs are recommended for early evaluation of recurrent syncope.
  • ILRs are integral to comprehensive high-risk syncope assessment.
  • Evidence supports the unique role of ILRs in syncope diagnosis.