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ismailalmokyad's version from 2018-01-25 05:13

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1-what is diagnostic priority in patients with blunt thoracic trauma and early signs of shock (eg, hypotension, tachycardia).is identification of injuries that can be rapidly fatal (eg, pneumothorax, aortic dissection, hemoperitoneum, pericardial effusion leading to tamponade), which is best accomplished with bedside ultrasound or focused assessment with sonography in trauma (FAST). Detection of abnormalities should prompt further directed evaluation (eg, CT scan, echocardiography) or specific therapy (eg, laparotomy, pericardiocentesis).
2-what are types of paroxysmal supraventricular tachycardia (PSVT) and how it presentpresent as abrupt onset and offset and regular ventricular response. the types are
1-atrioventricular nodal reentrant tachycardia (AVNRT)
2-atrioventricular reentrant tachycardia (AVRT),
3- atrial tachycardia.
3-what is ECG finding in PSVTECG demonstrates a narrow-complex tachycardia with regular R-R intervals, and may show retrograde P waves that are typically inverted in the inferior leads.
4-how to manage PSVT-In hemodynamically stable patients, vagal maneuvers (eg, Valsalva) can be performed or adenosine administered to slow the atrioventricular node and allow for easier identification arrhythmia on cardiac monitoring; however,

-hemodynamically unstable patients should undergo urgent synchronized cardioversion.

-Cardiac ablation of the secondary conduction pathway is the definitive treatment of choice in symptomatic patients.
5-ECG in Sinus tachycardiahas narrow QRS complexes but normal (rather than retrograde) P waves and often gradual (rather than abrupt) onset.
6-ECG in Wolff-Parkinson-White (WPW) patternclassic ECG findings are short PR interval, slurred upstroke of the QRS complex (delta wave), and widening of the QRS complex.
7-what cause Wolff-Parkinson-White (WPW) patternextranodal accessory conduction pathway that directly connects the atria and ventricles, bypassing the atrioventricular node
8-how to diffrintiate Panic attacks rapid sinus tachycardia from psvt-panic attack and sinus tachycardia has gradual onset and recovers gradually with time.
-In contrast, AVRT associated with an accessory pathway has an abrupt onset and termination.
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