Các 'c' là một chụp xoang. B. 'e' là để thoát khỏi tâm thất. Các 'c' là một PAC. C. 'e' là một thoát khỏi nối, 'c' đại diện cho một PAC. D. 'e' đại diện cho một nhịp thoát nối, 'c' đại diện cho một chụp xoang. E. 'e' đại diện cho một tâm thất sớm phức tạp và 'c' đại diện cho một parasystole. | Q5 This is the ECG V1 cheat lead rhythm strip of a 53 year old man with dropped beats. What is the degree of AV block if present A. 1st degree AV block B. 2nd degree AV block C. 3rd degree AV block D. No AV block this is complete AV dissociation E. This is a sinus pause Answer B Some P waves conduct and some do not. Q6 This is the V1 strip rhythm of 61-year-old woman with a history ischemic heart disease. What does e and c mean A. The e represents a ventricular echo beat form the nonconducted P wave. The c is a sinus capture. B. The e is for ventricular escape. The c is a PAC. C. The e is a junctional escape and c represents a PAC. D. The e represents a junctional escape beat the c represents a sinus capture. E. The e represents a ventricular premature complex and c represents a parasystole. Answer D Sometimes this goes by the name of escape-capture bigeminy . Any pause in the rhythm may result in an escape beat if the pause is too long. 41 Q7 You re reading an ECG taken for 48 year old woman with idiopathic dilated cardiomyopathy. What is your conclusion of this confusing V1 strip rhythm B. Complete AV block junctional escape rhythm occasional PVC C. Sinus rhythm with 1st degree AV block occasional PVC D. Junctional rhythm PVC and nonconducted PAC E. Wandering atrial pacemaker. Answer C Thanks to the PVC and resulting pause the sinus P wave becomes separated form the preceding T wave. The 1st degree AV block is quite marked. Q8 This is the V1 strip rhythm of a 37-year-old man with dropped beats. How do explain the pause in his ECG strip B. 2nd degree AV block Type II Mobitz C. Nonconducted PACs D. Marked sinus arrhythmia E. Pacemaker failure Answer C This is the most common cause of an unexpected pause in the rhythm. The P-waves of the PACs are early relative to the sinus PP intervals. Q9 Your junior house officer is perplexed after seeing this V1 strip rhythm with many pauses. He asked you what event terminates these pauses 42 A. A sinus beat that has been reset
