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Cardiovascular magnetic resonance imaging, or CMRI, is a non-invasive diagnostic test that employs a magnetic field and radiofrequency waves to create precise images of the heart and arteries. It provides comprehensive information about cardiac anatomy, function, perfusion, and tissue characterization without ionizing radiation.IndicationsCMRI diagnoses various heart conditions, including tissue damage from heart attacks, ischemic heart disease, myocarditis, aortic issues (tears, aneurysms,...
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Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
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Imaging Studies for Cardiovascular System III: X-Ray01:20

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The most common cardiovascular diagnostic test is an X-ray. It produces images of the heart, blood vessels, and adjacent structures.
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Calcium-Scoring CT ScanA calcium-scoring CT scan, also known as coronary artery calcium (CAC) scan, detects calcium deposits in the coronary arteries. This test assesses the risk of coronary artery disease (CAD), which can lead to cardiovascular events such as angina, heart failure, and sudden cardiac arrest.A calcium-scoring CT scan is generally recommended for individuals at intermediate risk of CAD without symptoms. It includes:Men aged 40-75 and women aged 50-75: Especially those with a...
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Cardiac imaging studies encompass a wide range of noninvasive and minimally invasive techniques designed to visualize the heart's structure and function in detail. One such technique is echocardiography, which uses high-frequency ultrasound waves to produce detailed images of the heart, known as echocardiograms.
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Diagnosing acute coronary syndrome or ACS begins with a thorough patient history. Notable symptoms include central, crushing chest pain radiating to the left arm, neck, jaw, or back, along with shortness of breath, sweating (diaphoresis), nausea, vomiting, dizziness, and palpitations.It is crucial to note any history of cardiac illnesses and assess risk factors, including age, gender, smoking, hypertension, diabetes, hyperlipidemia, and a sedentary lifestyle.During physical examination, vital...
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Related Experiment Video

Updated: Mar 7, 2026

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Cyclic nucleotide imaging and cardiovascular disease.

Filip Berisha1, Viacheslav O Nikolaev2

  • 1Institute of Experimental Cardiovascular Research, University Medical Center Hamburg-Eppendorf, Hamburg, Germany; Department of General and Interventional Cardiology, University Heart Center Hamburg, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.

Pharmacology & Therapeutics
|February 21, 2017
PubMed
Summary

New live cell imaging techniques allow visualization of cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate (cGMP) signaling in cardiovascular function and disease. These methods offer unprecedented spatial and temporal resolution for studying these crucial second messengers.

Keywords:
BiosensorsFRETMicrodomainSICMcAMPcGMP

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Area of Science:

  • Cardiovascular Physiology
  • Cell Signaling
  • Biomedical Imaging

Background:

  • Cyclic nucleotides, 3',5'-cyclic adenosine monophosphate (cAMP) and 3',5'-cyclic guanosine monophosphate (cGMP), are vital second messengers in cardiovascular function and disease.
  • These molecules regulate critical processes like calcium cycling and excitation-contraction coupling within specific subcellular microdomains.
  • Conventional biochemical methods struggle to measure these localized signals effectively.

Purpose of the Study:

  • To review novel live cell imaging techniques for visualizing cAMP and cGMP.
  • To demonstrate the application of these techniques in understanding cardiovascular physiology and pathology.
  • To highlight the importance of spatial and temporal resolution in studying second messenger signaling.

Main Methods:

  • Utilizing Förster resonance energy transfer (FRET) based cyclic nucleotide biosensors.
  • Employing nanoscale scanning ion conductance microscopy (SICM).
  • Live cell imaging techniques providing high spatial and temporal resolution.

Main Results:

  • Demonstrated visualization of cAMP and cGMP in physiological and pathological cardiovascular settings.
  • Provided examples of how these techniques elucidate localized signaling.
  • Enabled deep mechanistic insights into compartmentalized cyclic nucleotide signaling.

Conclusions:

  • Live cell imaging techniques, including FRET biosensors and SICM, are powerful tools for studying cardiovascular cyclic nucleotide signaling.
  • These advanced methods overcome limitations of traditional techniques, offering better understanding of cardiovascular function and disease.
  • Visualizing localized cAMP and cGMP signals is crucial for unraveling complex cardiovascular mechanisms.