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57 Possible Causes for Cannon A-Waves

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  • Third Degree Atrioventricular Block

    Inspection may show turgescent jugular veins and cannon " a" waves caused by the contraction of the right atrium against the closed tricuspid valve, peripheral edema or skin[symptoma.com] Careful examination of the neck veins can often show evidence of cannon ‘a’ waves. A variable intensity S 1 may be heard on auscultation.[emedicine.medscape.com] The presence of an increased a-c interval, increasing jugular venous distension, or cannon A waves (right atrium closing against a closed tricuspid valve in 3rd degree block[clinicaladvisor.com]

  • Congenital Heart Block

    Physical exam is significant for a weak pulse, widened pulse pressure, crackles auscultated at the bilateral lung bases, and cannon a-waves noted at the internal jugular veins[step2.medbullets.com] . • Other clinical clues in the neonate may include: -Intermittent cannon waves in the neck -Variable intensity of the first heart sound -Intermittent gallops and murmurs[slideshare.net]

  • Jugular Venous Distention

    The "Examination of jugular veins (e.g. distention; a, v or cannon a waves)" bullet is only listed in the cardiovascular [...] SIGN UP / LOGIN to read the article[supercoder.com] Examples include: Pulmonary Hypertension Rheumatic tricuspid stenosis Right atrial mass or thrombus Cannon "a" wave Large positive venous pulse during "a" wave.[stanfordmedicine25.stanford.edu] […] pressure) Tricuspid stenosis Right heart failure Pulmonary hypertension Cannon 'a' wave (atria contracting against closed tricuspid valve) Atrial flutter Premature atrial[en.wikipedia.org]

  • Constrictive Pericarditis

    Such cannon a waves may occur regularly in junctional rhythm.[rjmatthewsmd.com] Cannon a waves occur when the right atrium contracts while the tricuspid valve is closed during RV systole. 20 Cannon a waves may occur either regularly or irregularly and[rjmatthewsmd.com] […] complex and the termination of the T wave (see Fig. 38f-G).[rjmatthewsmd.com]

  • Second Degree Atrioventricular Block

    The presence of an increased a-c interval, increasing jugular venous distension, or cannon A waves (right atrium closing against a closed tricuspid valve in 3rd degree block[clinicaladvisor.com] Signs include those of AV dissociation, such as cannon a waves, BP fluctuations, and changes in loudness of the 1st heart sound (S 1 ).[merckmanuals.com] An inability of the patient to follow instructions, crackles on pulmonary exam and cannon A waves observed within jugular venous pulsations may indicate a clinically severe[clinicaladvisor.com]

  • Distended Neck Veins

    Cannon a waves occur during systole.[depts.washington.edu] This causes the atria to contract against the closed AV valves producing what is called "cannon A waves" in the neck veins.[rnceus.com] […] pressure) Tricuspid stenosis Right heart failure Pulmonary hypertension Cannon 'a' wave (atria contracting against closed tricuspid valve) Atrial flutter Premature atrial[en.wikipedia.org]

  • AV Block Mobitz II

    The presence of an increased a-c interval, increasing jugular venous distension, or cannon A waves (right atrium closing against a closed tricuspid valve in 3rd degree block[clinicaladvisor.com] Physical exam is significant for a weak pulse, widened pulse pressure, crackles auscultated at the bilateral lung bases, and cannon a-waves noted at the internal jugular veins[medbullets.com] Signs include those of AV dissociation, such as cannon a waves, BP fluctuations, and changes in loudness of the 1st heart sound (S 1 ).[merckmanuals.com]

  • AV Block Mobitz I

    The presence of an increased a-c interval, increasing jugular venous distension, or cannon A waves (right atrium closing against a closed tricuspid valve in 3rd degree block[clinicaladvisor.com] Signs include those of AV dissociation, such as cannon a waves, BP fluctuations, and changes in loudness of the 1st heart sound (S 1 ).[merckmanuals.com] An inability of the patient to follow instructions, crackles on pulmonary exam and cannon A waves observed within jugular venous pulsations may indicate a clinically severe[clinicaladvisor.com]

  • First-Degree Atrioventricular Block

    The presence of an increased a-c interval, increasing jugular venous distension, or cannon A waves (right atrium closing against a closed tricuspid valve in 3rd degree block[clinicaladvisor.com] Signs include those of AV dissociation, such as cannon a waves, BP fluctuations, and changes in loudness of the 1st heart sound (S 1 ).[merckmanuals.com] An inability of the patient to follow instructions, crackles on pulmonary exam and cannon A waves observed within jugular venous pulsations may indicate a clinically severe[clinicaladvisor.com]

  • Heart Block

    Physical exam is significant for a weak pulse, widened pulse pressure, crackles auscultated at the bilateral lung bases, and cannon a-waves noted at the internal jugular veins[step2.medbullets.com] The presence of an increased a-c interval, increasing jugular venous distension, or cannon A waves (right atrium closing against a closed tricuspid valve in 3rd degree block[clinicaladvisor.com] An inability of the patient to follow instructions, crackles on pulmonary exam and cannon A waves observed within jugular venous pulsations may indicate a clinically severe[clinicaladvisor.com]

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