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Related Concept Videos

Blood Studies for Cardiovascular System I: Cardiac Biomarkers01:20

Blood Studies for Cardiovascular System I: Cardiac Biomarkers

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Cardiac biomarkers are enzymes, proteins, and hormones released into the blood when cardiac cells are injured. They are powerful tools for triaging.
The essential diagnostic tools for detecting myocardial necrosis and monitoring individuals suspected of having acute coronary syndrome (ACS) include:
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Troponins, particularly cardiac troponins I and T, are the most precise and sensitive markers of myocardial injury. They are detectable within 4-6 hours of myocardial injury and remain...
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Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers01:19

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Cardiac biomarkers are critical in diagnosing, prognosing, and managing cardiovascular diseases. Routine measurement of specific biomarkers such as B-type natriuretic peptide (BNP), C-reactive protein (CRP), and homocysteine (Hcy) is common practice in clinical settings to evaluate heart function and predict cardiovascular events.
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Natriuretic Peptides (BNP)
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Acute Inflammation II: Local and Systemic Effects01:25

Acute Inflammation II: Local and Systemic Effects

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Acute inflammation produces a coordinated set of local and systemic changes that limit injury, eliminate pathogens, and initiate repair. These responses arise within minutes of infection, trauma, or chemical insult and are driven by vascular alterations and leukocyte-derived mediators. When the stimulus resolves, the reaction typically abates within days.Local EffectsAt the site of injury, arteriolar vasodilation increases blood flow, resulting in redness and warmth. Simultaneously, increased...
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Acute Coronary Syndrome III: Diagnostic Studies01:30

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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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Acute Kidney Injury III: Clinical Manifestations01:29

Acute Kidney Injury III: Clinical Manifestations

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Acute Kidney Injury (AKI) progresses through distinct clinical phases: the oliguric, diuretic, and recovery phases, each marked by unique manifestations and challenges.Oliguric Phase:The oliguric phase is the initial stage of AKI, typically lasting 10 to 14 days. This phase is marked by a significant reduction in urine output, usually less than 400 mL per day, indicating decreased kidney function. Fluid retention is a prominent feature, leading to symptoms such as edema, hypertension, and...
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Coronary Progenitor Cells and Soluble Biomarkers in Cardiovascular Prognosis after Coronary Angioplasty
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C-reactive protein kinetics after major surgery.

Cristina Santonocito1, Isabelle De Loecker, Katia Donadello

  • 1From the Department of Intensive Care, Erasme Hospital, Université Libre de Bruxelles, Brussels, Belgium; and †Department of Intensive Care, AOU Policlinicao-Vittorio Emanuele, Univerità degli Studi di Catania, Catania, Italy.

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Summary

Postoperative infection diagnosis is challenging. C-reactive protein (CRP) levels rise after surgery, but significantly higher levels after postoperative day 4 suggest infection in surgical patients.

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Area of Science:

  • Critical Care Medicine
  • Surgical Infection Markers
  • Inflammatory Response

Background:

  • Diagnosing postoperative sepsis presents challenges.
  • Interpreting inflammatory markers like C-reactive protein (CRP) is complex in surgical patients.
  • This study investigates CRP and white blood cell count changes in postoperative patients with and without infection.

Purpose of the Study:

  • To evaluate changes in blood C-reactive protein (CRP) levels and white blood cell counts.
  • To differentiate between infected and noninfected postoperative patients.
  • To assess the utility of CRP in diagnosing postoperative infections.

Main Methods:

  • Prospective inclusion of 151 intensive care patients undergoing major surgery.
  • Daily screening for infection and daily recording of CRP levels and white blood cell counts for up to 7 days.
  • Characterization of patients as infected (n=20) or noninfected (n=117).

Main Results:

  • In noninfected patients, CRP levels peaked around postoperative day 3 and remained elevated.
  • Postoperative infection occurred in 13.2% of patients.
  • Infected patients showed significantly higher CRP levels on postoperative day 1 compared to noninfected patients.

Conclusions:

  • C-reactive protein (CRP) levels increase post-surgery, with a more pronounced rise in infected patients.
  • Persistently high CRP levels (>100 mg/L) after postoperative day 4 are indicative of infection.
  • CRP monitoring aids in the early detection of postoperative infections.