SHARP EKG TEST BANK & STUDY
GUIDE PDF – VERIFIED
QUESTIONS & ACCURATE
ANSWERS 2026 GRADED A+| ECG
INTERPRETATION, CARDIOLOGY,
& NURSING EXAM PREP
What are the two sounds you hear in the heart? - answer-1. Lub
2. Dub
When do we hear the sound "lub" in the heart? - answer-When the bicuspid and
tricuspid valve close to prevent blood from flowing backwards in to the atria
When do we hear the sound lab "dub" in the heart? - answer-When the aortic and
pulmonary valves close to prevent blood from flowing backwards into the ventricles
The natural rhythm of heart contraction - answer-is autonomous-not consciously
thinking of to happen
Regulated by nervous and chemical control systems
Nervous stimuli (nervous control systems) - answer-Can greatly impact heart rate
For eg. excitement or stress increases the heart rate. During exercise or physical
stimulation, the heartbeat is affected
Chemical Factors - answer--Carbon monoxide slows heartbeat-(for eg. starting a car
with garage door not Klein fills with CO (silent killer)
-An excess of oxygen increases it
-Substances like nicotine, caffeine, can alcohol accelerate the heartbeat ( makes your
heart work harder and you drowsy)
GUIDE PDF – VERIFIED
QUESTIONS & ACCURATE
ANSWERS 2026 GRADED A+| ECG
INTERPRETATION, CARDIOLOGY,
& NURSING EXAM PREP
What are the two sounds you hear in the heart? - answer-1. Lub
2. Dub
When do we hear the sound "lub" in the heart? - answer-When the bicuspid and
tricuspid valve close to prevent blood from flowing backwards in to the atria
When do we hear the sound lab "dub" in the heart? - answer-When the aortic and
pulmonary valves close to prevent blood from flowing backwards into the ventricles
The natural rhythm of heart contraction - answer-is autonomous-not consciously
thinking of to happen
Regulated by nervous and chemical control systems
Nervous stimuli (nervous control systems) - answer-Can greatly impact heart rate
For eg. excitement or stress increases the heart rate. During exercise or physical
stimulation, the heartbeat is affected
Chemical Factors - answer--Carbon monoxide slows heartbeat-(for eg. starting a car
with garage door not Klein fills with CO (silent killer)
-An excess of oxygen increases it
-Substances like nicotine, caffeine, can alcohol accelerate the heartbeat ( makes your
heart work harder and you drowsy)
