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  1. Great Vessels And Heart

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    Description: Illustration of heart and the great vessels, labeled.
    Keywords: Subclavian Vein, Subclavian Artery, Vena Cava, Superior, Common Carotid Artery, Pulmonary Veins, Carotid Artery, Common, Pulmonary Artery, Superior Vena Cava, Heart, Inferior Vena Cava, Vena Cava, Inferior, Cardiovascular System, Jugular Veins, Brachiocephalic Trunk

  2. Respiratory System

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    Description: Anatomy of the respiratory system.
    Keywords: Gas Exchange, Reperfusion, Alveoli, Pulmonary Ventilation, Ventilation/ Perfusion anatomy, Respiratory System, Respiratory Tree

  3. Airway Diagram

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    Description: Airways, tracheal/bronchial, lung parenchyma
    Keywords: Alveoli, Ventilation/ Perfusion anatomy, Respiratory System, Reperfusion, Pulmonary Ventilation, Gas Exchange, Respiratory Tree

  4. Diagnostic algorithm: Pulmonary embolism

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    Description: A diagnostic algorithm for pulmonary embolism (estimated frequencies of test results and associated prevalences of pulmonary embolism for a hypothetical cohort of 1000 outpatients) [1]. If a very sensitive D-dimer assay is used, it can be the first test performed: a negative result excludes pulmonary embolism regardless of clinical assessment category and a positive test can be followed by a ventilation–perfusion scan [2]. A ventilation–perfusion scan can be performed as the initial test without using clinical assessment of the probability of pulmonary embolism as part of the diagnostic process [3]. Pulmonary angiography or helical CT may be considered if the clinical assessment of pulmonary embolism probability is low, particularly if a D-dimer test has not been done [4]. Additional testing (e.g., helical CT, bilateral venography) may be considered if overall assessment suggests a high probability of pulmonary embolism (e.g., 50%–80%), symptoms are severe or cardiopulmonary reserve is poor [5]. Venography should be considered if there is an increased risk of a false-positive ultrasound result (e.g., previous venous thromboembolism, equivocal ultrasound findings, preceding findings suggest low probability of pulmonary embolism [e.g., ≤ 10%]) [6]. It is reasonable not to repeat ultrasound testing, or to do only 1 more ultrasound after 1 week, if preceding findings suggest a low probability of pulmonary embolism (e.g., ≤ 10%) [7]. If helical CT is used in place of ventilation–perfusion lung scanning: (i) intraluminal filling defects in segmental or larger pulmonary arteries are generally diagnostic for pulmonary embolism; (ii) all other findings (i.e., a normal CT scan or intraluminal filling defects confined to the subsegmental pulmonary arteries) are nondiagnostic and can be managed as shown for a nondiagnostic lung scan.
    Keywords: Embolism, Pulmonary Thromboembolism, Thromboembolism, Pulmonary, Embolism, Pulmonary Pulmonary Thromboembolisms, Embolisms, Pulmonary, Thromboembolisms, Pulmonary, Vascular Diseases, Pulmonary Embolisms

  5. Heart cross section, matching

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    Description: Heart illustration in cross section with great vessels, ABCs
    Keywords: superior vena cava, arch of the aorta, inferior vena cava, Heart, heart chambers, Heart Ventricles, Vena Cava, Superior, Vena Cava, Inferior, pulmonary artery, illustration

  6. Flow of blood through the heart

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    Description: Heart diagram showing normal flow of blood through atria and ventricles
    Keywords: inferior vena cava, Heart, Vena Cava, Inferior, heart chambers, Heart Ventricles, superior vena cava, Vena Cava, Superior, illustration, arch of the aorta, pulmonary artery