Radiographic Diagnosis of Right Ventricular Enlargement
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Questions and Answers

Which of the following is a common clinical sign of left-sided congestive heart failure?

  • Bradycardia
  • Tachypnea (correct)
  • Hypotension
  • Chest pain

    • Why is it important to understand the information provided by diagnostic tests in acute congestive heart failure?

  • To reduce patient vulnerability to stress
  • To avoid unnecessary testing
  • To guide therapy in the early phase of patient management (correct)
  • To improve patient compliance with treatment

    • What does elevation of left atrial pressure lead to in left-sided congestive heart failure?

  • Increase in gaseous exchange
  • Extravasation of fluid into the systemic circulation
  • Decrease in pulmonary venous pressure
  • Disruption of Starling's forces across the pulmonary capillary (correct)

    • What is the diagnostic challenge presented by a patient in acute congestive heart failure?

    <p>Avoiding compromise of respiratory or cardiovascular function during testing</p> Signup and view all the answers

    What is the primary effect of disruption of Starling's forces across the pulmonary capillary in left-sided congestive heart failure?

    <p>Disruption of gaseous exchange</p> Signup and view all the answers

    Which diagnostic test is discussed in detail in the article about acute congestive heart failure?

    <p>Pericardiocentesis</p> Signup and view all the answers

    Which radiographic view should right ventricular enlargement be suspected on if the distance from an imaginary line drawn from the carina to the apex to the cranial border of the cardiac silhouette is greater than 2.5 times the distance from the same imaginary line to the caudal border?

    <p>Lateral view</p> Signup and view all the answers

    What supporting evidence of right ventricular enlargement includes dorsal displacement of the apex from the sternum and shift of the contact point between the heart silhouette and the sternum cranially?

    <p>Apical shift</p> Signup and view all the answers

    What might be seen on the dorsoventral view if right ventricular enlargement is present?

    <p>Double apex appearance</p> Signup and view all the answers

    What may be displaced on the lateral chest radiograph if right atrial enlargement and right ventricular enlargement are present?

    <p>Trachea</p> Signup and view all the answers

    What might cause a bulge in the 8 to 12 o'clock position on the ventrodorsal film?

    <p>Right ventricular enlargement</p> Signup and view all the answers

    What may cause a right axis deviation on the ECG if present?

    <p>Right ventricular enlargement</p> Signup and view all the answers

    What is identified as a beat-to-beat variation in the complex amplitude of the R wave, Q wave, S wave, or T wave, if present?

    <p>Electrical alternans</p> Signup and view all the answers

    Which imaging modality is best for assessing pericardial effusion before pericardiocentesis?

    <p>Echocardiogram</p> Signup and view all the answers

    What are the therapeutic goals stated for managing acute CHF?

    <p>Improve cardiac output and remove fluid pharmacologically or mechanically</p> Signup and view all the answers

    Which approach to pericardiocentesis carries a slightly greater risk for coronary artery damage but less chance of confusion about needle placement if the left ventricle is inadvertently punctured?

    <p>Approach from the left side of the chest</p> Signup and view all the answers

    Which approach to pericardiocentesis carries less risk of coronary damage but more risk of confusion if the right ventricle is inadvertently punctured?

    <p>Approach from the right side of the chest</p> Signup and view all the answers

    What is the purpose of having a current packed cell volume (PCV) on the patient during pericardiocentesis?

    <p>To compare with the PCV of the tapped fluid</p> Signup and view all the answers

    What is typically done to the catheter during preparation for pericardiocentesis?

    <p>Small fenestrations are cut in the catheter with a No. 11 scalpel blade</p> Signup and view all the answers

    What should be done once the flash of port-wine-colored fluid is seen in the needle and extension set during pericardiocentesis?

    <p>Advance the catheter further into the pericardium</p> Signup and view all the answers

    What precaution should be taken to prevent burring of the catheter as it penetrates the tough subcuticular tissue during pericardiocentesis?

    <p>Make a small skin nick at the point of entry of the catheter</p> Signup and view all the answers

    What should be evaluated in initial samples of the fluid obtained during pericardiocentesis?

    <p>Presence of clotting</p> Signup and view all the answers

    How should an inadvertent ventricular puncture during pericardiocentesis be confirmed?

    <p>By observing an increase in heart rate on the ECG</p> Signup and view all the answers

    What is recommended if cardiac output is severely compromised in a patient with cardiac tamponade?

    <p>Administer shock doses of IV fluid</p> Signup and view all the answers

    What may paradoxically occur if filling pressures are increased in a patient showing signs of right heart failure?

    <p>Exacerbation of ascites</p> Signup and view all the answers

    What may result from systolic dysfunction causing diminished cardiac output?

    <p>Dilated cardiomyopathy and end-stage chronic valve disease.</p> Signup and view all the answers

    What occurs with diastolic dysfunction?

    <p>Hypertrophic cardiomyopathy, restrictive heart disease, and pericardial effusion.</p> Signup and view all the answers

    What is a major cause of systolic dysfunction?

    <p>Dilated cardiomyopathy and end-stage chronic valve disease.</p> Signup and view all the answers

    What management approach is recommended for low-output cardiac failure caused by diastolic dysfunction?

    <p>Avoid increasing filling pressures</p> Signup and view all the answers

    What is the diagnostic test of choice to provide a definitive diagnosis of the underlying cardiac disease?

    <p>Echocardiography</p> Signup and view all the answers

    Which test will help confirm the diagnosis of valve disease as the cause of a murmur in a coughing small breed dog?

    <p>Echocardiography</p> Signup and view all the answers

    What characteristic is electrocardiographically suggestive of a symptomatic diagnosis of left-sided congestive heart failure?

    <p>Tall R wave</p> Signup and view all the answers

    Which pharmacological intervention is aimed at reducing both preload and afterload in acute congestive heart failure?

    <p>Sodium nitroprusside</p> Signup and view all the answers

    What is a characteristic clinical sign related to right-sided congestive heart failure?

    <p>Ascites</p> Signup and view all the answers

    Which assessment is difficult unless invasive techniques that assess pulmonary capillary wedge pressure (PCWP) are used?

    <p>Assessment of left atrial pressure</p> Signup and view all the answers

    What should be paid careful attention to when examining a patient with suspected right-sided congestive heart failure?

    <p>Arterial and jugular pulses</p> Signup and view all the answers

    What is suggested by the presence of pulses paradoxus in any patient presenting with right heart failure?

    <p>Pericardial effusion</p> Signup and view all the answers

    'Ballotment' will confirm the presence of what in a patient with right-sided congestive heart failure?

    <p>'Ascites'</p> Signup and view all the answers

    Which imaging modality is best for assessing pericardial effusion before pericardiocentesis?

    <p>Echocardiography</p> Signup and view all the answers

    What should be done once the flash of port-wine-colored fluid is seen in the needle and extension set during pericardiocentesis?

    <p>Stop and remove the needle completely</p> Signup and view all the answers

    What is the cardinal clinical sign associated with left heart failure?

    <p>Pulmonary edema</p> Signup and view all the answers

    Which diagnostic test is the test of choice for establishing a diagnosis of left-sided congestive heart failure?

    <p>Radiography</p> Signup and view all the answers

    What might be heard on auscultation in animals with cardiogenic pulmonary edema?

    <p>Crackles</p> Signup and view all the answers

    What is the primary cause of right-sided congestive heart failure?

    <p>Left heart failure</p> Signup and view all the answers

    Which drug is not listed in the formulary of drugs used in the emergency management of heart failure?

    <p>Atenolol</p> Signup and view all the answers

    What characteristic may help differentiate pulmonary edema from pneumonia on radiographs?

    <p>Left atrial enlargement</p> Signup and view all the answers

    Which drug is recommended for oral administration in the emergency management of heart failure?

    <p>Digoxin</p> Signup and view all the answers

    What common clinical sign is usually observed in cats with cardiogenic pulmonary edema?

    <p>Serosanguinous nasal discharge</p> Signup and view all the answers

    What may be seen radiographically in dogs with concurrent airway and valvular disease?

    <p>Enlarged left atrium</p> Signup and view all the answers

    What might be heard on auscultation in animals with severe LCHF?

    <p>Crackles</p> Signup and view all the answers

    What is the diagnostic challenge presented by a patient in acute congestive heart failure?

    <p>Establishing the cause of clinical signs</p> Signup and view all the answers

    What characteristic radiographic findings are associated with left-sided congestive heart failure?

    <p>Left atrial enlargement, pulmonary venous distension, alveolar pattern with air bronchograms</p> Signup and view all the answers

    Which clinical signs may indicate concurrent low-output failure in animals presenting with congestive heart failure?

    <p>Prolonged capillary refill, blanching of the mucous membranes, and cold extremities</p> Signup and view all the answers

    Which diagnostic tests are typically used for assessing animals with low output failure?

    <p>Tests for left heart failure</p> Signup and view all the answers

    What is the appropriate therapeutic intervention for systolic dysfunction causing a fall in cardiac output?

    <p>Use digoxin, dobutamine, and milrinone</p> Signup and view all the answers

    In which cardiovascular disease does left CHF occur initially, followed by low-output failure in the end stages or after the rupture of cordae tendineae?

    <p>Chronic valve disease</p> Signup and view all the answers

    What type of low-output failure occurs concurrently with dilated cardiomyopathy?

    <p>Systolic low-output failure</p> Signup and view all the answers

    Which pharmacological intervention is used for diastolic dysfunction caused by hypertrophic cardiomyopathy (HCM)?

    <p>Use negative inotropes</p> Signup and view all the answers

    What type of low-output failure occurs in heartworm disease?

    <p>Right congestive failure</p> Signup and view all the answers

    Which cardiovascular disease is associated with extracardiac diastolic dysfunction causing low-output failure?

    <p>Pericardial effusion</p> Signup and view all the answers

    Which intervention is appropriate for extracardiac causes of diastolic dysfunction, such as pericardial effusion?

    <p>Remove the cause/fluid (i.e., pericardiocentesis)</p> Signup and view all the answers

    What should be secured once the patient is stable enough to undergo further diagnostic testing for long-term management and prognosis assessment?

    <p>A complete cardiac database</p> Signup and view all the answers

    What is the most appropriate therapeutic goal in low-output failure?

    <p>Increase Cardiac Output</p> Signup and view all the answers

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