KIN 433 Exam #2

Identify

• 2nd degree AV block: mobitz I

• 2nd degree AV block: mobitz II

• 1st degree AV block

• Left Ventricular Hypertrophy

Answer explanation

1st degree AV block is characterized by a prolonged PR interval with all impulses conducted. In contrast, Mobitz I and II involve dropped beats, and left ventricular hypertrophy is a structural change, not a conduction block.

Identify

• 2nd degree AV block: mobitz II

• 2nd degree AV block: mobitz I

• 1st degree AV block

• 3rd degree AV block

Answer explanation

2nd degree AV block: Mobitz I, also known as Wenckebach, is characterized by progressive PR interval prolongation followed by a dropped beat. This pattern distinguishes it from Mobitz II, which has a consistent PR interval.

Identify

Answer explanation

The correct answer is 0 because a 2nd degree AV block Mobitz II typically does not present with a 3:1 ratio. This indicates that there are fewer dropped beats than would be expected in a 3:1 ratio scenario.

Identify

Answer explanation

The correct answer is 0 because a 2nd degree AV block Mobitz I (Wenckebach) typically does not present with a 5:4 ratio. Instead, it is characterized by progressively lengthening PR intervals until a beat is dropped.

Identify

Answer explanation

Left bundle branch block (LBBB) is a condition where the electrical impulses in the heart are delayed or blocked in the left bundle branch. This results in a characteristic pattern on an ECG, which is crucial for diagnosis.

Identify

Answer explanation

The correct answer is 0 because a 2nd degree AV block Mobitz II typically does not present with a 4:3 ratio. Instead, it is characterized by dropped beats without a preceding pattern, making the identification of a 4:3 ratio incorrect.

Identify

Answer explanation

3rd degree AV block indicates complete heart block with no conduction between atria and ventricles. A junctional focus typically arises from the AV node, which is not the case here, hence the correct answer is 0.

Identify

Answer explanation

The correct answer is 0 because 2nd degree AV block Mobitz I (Wenckebach) is characterized by progressive PR interval prolongation leading to a dropped beat, not a 4:3 block. Thus, the identification is incorrect.

Identify

Answer explanation

The correct answer is '0' because 'Right bundle branch block' is not identified in the context provided. Therefore, it is not applicable.

Identify

Answer explanation

3rd degree AV block typically presents with a complete dissociation between atrial and ventricular activity. A ventricular focus is not the correct identification in this case, hence the answer is 0.