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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...
Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
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...
Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

Bradyarrhythmias are cardiac rhythm disorders characterized by a slower-than-normal heart rate, typically defined as fewer than 60 beats per minute. Some of which are discussed here:Sinus BradycardiaSinus bradycardia presents a heart rate lower than 60 beats per minute, with a regular rhythm originating from the SA node. The ECG typically shows normal P waves preceding each QRS complex, a normal PR interval (0.12 to 0.20 seconds), and a normal QRS duration (0.06 to 0.10 seconds).First-Degree AV...
Dysrhythmias V: Evaluating Dysrhythmias01:30

Dysrhythmias V: Evaluating Dysrhythmias

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...
Dysrhythmias VI: Management of Dysrhythmias01:25

Dysrhythmias VI: Management of Dysrhythmias

Dysrhythmia management involves a multifaceted approach, incorporating pharmacological treatments, medical procedures, surgical interventions, lifestyle modifications, and patient education.Pharmacological ManagementAntiarrhythmic Drugs:Class I (Sodium Channel Blockers): This class includes quinidine and procainamide, which reduce the speed of impulse conduction in the heart, stabilize the cardiac membrane, and control arrhythmias. Quinidine and procainamide are Class IA agents that prolong the...

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MeNPs-PEDOT Composite-Based Detection Platforms for Epinephrine and Quercetin.

Sorina Alexandra Leau1,2, Mariana Marin1, Ana Maria Toader1

  • 1Department of Electrochemistry and Corrosion, Institute of Physical Chemistry-Ilie Murgulescu of the Romanian Academy, 202 Splaiul Independentei, 060021 Bucharest, Romania.

Biosensors
|July 26, 2024
PubMed
Summary

Researchers developed cost-effective electrochemical sensors using silver and gold nanoparticles with conductive polymers for detecting biomolecules like quercetin and epinephrine, enabling health monitoring.

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Area of Science:

  • Electrochemistry
  • Nanomaterials Science
  • Analytical Chemistry

Background:

  • Growing need for low-cost, sensitive analytical tools for health monitoring.
  • Nanocomposite materials are key for advanced biomolecule sensing platforms.
  • Existing methods often lack cost-effectiveness or simplicity.

Purpose of the Study:

  • To develop novel electrochemical sensing platforms for biomolecule detection.
  • To utilize a new fabrication method for creating cost-effective sensors.
  • To demonstrate proof-of-concept for detecting antioxidant (quercetin) and neurotransmitter (epinephrine) biomarkers.

Main Methods:

  • Fabrication of sensing platforms using glassy carbon or screen-printed carbon electrodes.
  • Functionalization with nanocomposites of silver (Ag) and gold (Au) nanoparticles and poly(3,4-ethylenedioxythiophene).
  • Novel alternating current electrodeposition technique with specific frequencies (100 mHz for polymer, 50 mHz for nanoparticles).

Main Results:

  • Successful preparation of Ag/Au-polymer nanocomposite materials.
  • Demonstrated effective detection of quercetin and epinephrine.
  • Achieved wide linear response ranges and low limit-of-detection values for both analytes.

Conclusions:

  • The developed electrochemical sensing platforms are cost-effective and sensitive.
  • The novel fabrication method enables efficient creation of nanocomposite sensors.
  • These platforms show significant potential for health status monitoring and biomarker detection.