Basic Cardiac Dysrhythmia Concepts Questions and Answers 2026.docx

Basic Cardiac
Dysrhythmia
Concepts
Questions and
Answers 2026

, heart rhythm originating in the sinoatrial node with a rate in patients at rest of 60 to 100 beats per minute -
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correct answernormal sinus rhythm k k k




Appearance is ALMOST NORMAL: k k k




Respiratory - Circulatory interaction k k k




Rate INCREASES with INSPIRATION (IN=IN) - correct answerSinus Arrhythmia
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<60

normal sinus rhythm - correct answerSinus Bradycardia
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>100 (100-150) k




normal sinus rhythm - correct answerSinus Tachycardia
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Heart Rate: Depends on underlying rhythm
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Regularity: Interrupts the regularity of underlying rhythm k k k k k k




P-Wave: can be flattened, notched, or unusual. May be hidden within the T wave
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PRI: measures between .12-.20 seconds and can be prolonged; can be different from other complexes
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QRS: <.12 seconds - correct answerPremature Atrial Contraction (PAC)
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- SA node doesn't fire
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- notice absence of P-wave for a complete cycle (a missed cycle)
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length of pause ≠ multiple of normal rate (block) - correct answerSinus Arrest/Pause
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an irregular and often very fast heart rate originating from abnormal conduction in the atria - correct
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answerAtrial Fibrillation (A-Fib) k k




irregular beating of the atria; often described as "a-flutter with 2 to 1 block or 3 to 1 block" - correct
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answerAtrial Flutter k




40-60 Regular! k