ECGS MADE EASY ACTUAL TEST PAPER
QUESTIONS AND SOLUTIONS GRADED A+
◉ absolute refractory period.
Answer: Corresponds with the onset of the QRS complex to
approximately the peak of the T wave; cardiac cells cannot be
stimulated to conduct an electrical impulse, no matter how strong
the stimulus.
◉ accessory pathway.
Answer: An extra bundle of working myocardial tissue that forms a
connection between the atria and ventricles outside the normal
conduction system
◉ action potential.
Answer: a five-phase cycle that reflects the difference in the
concentration of charged particles across the cell membrane at any
given time
◉ amplitude.
Answer: height (voltage) of a waveform on an ecg
◉ artifact.
, Answer: distortion of an electrographic tracing by electrical acticity
that is noncardiac in origin (patient movement, electrical
interference, poor electrical conduction)
◉ atrioventricular bundle.
Answer: the bundle of HIS
◉ atrioventricular node.
Answer: A group of cells that conduct an electrical impulse through
the heart; located in the floor of the right atrium immediately behind
the tricuspid valve and near the opening of the coronary sinus;
delays the electrical impulse in order to allow the atria to contract
and complete filling of the ventricles
◉ augmented limb lead.
Answer: Leads aVR, aVL, and aVF; these leads record the difference
in electrical potentioal at one location, relative to zero potential
rather than relative to the electrical potential of another extremity
◉ automaticity.
Answer: ability of a cardiac msucle pacemaker cells to
spontaneously initiate an electrical impulse without being
stimulated frmo another source (such as a nerve)
QUESTIONS AND SOLUTIONS GRADED A+
◉ absolute refractory period.
Answer: Corresponds with the onset of the QRS complex to
approximately the peak of the T wave; cardiac cells cannot be
stimulated to conduct an electrical impulse, no matter how strong
the stimulus.
◉ accessory pathway.
Answer: An extra bundle of working myocardial tissue that forms a
connection between the atria and ventricles outside the normal
conduction system
◉ action potential.
Answer: a five-phase cycle that reflects the difference in the
concentration of charged particles across the cell membrane at any
given time
◉ amplitude.
Answer: height (voltage) of a waveform on an ecg
◉ artifact.
, Answer: distortion of an electrographic tracing by electrical acticity
that is noncardiac in origin (patient movement, electrical
interference, poor electrical conduction)
◉ atrioventricular bundle.
Answer: the bundle of HIS
◉ atrioventricular node.
Answer: A group of cells that conduct an electrical impulse through
the heart; located in the floor of the right atrium immediately behind
the tricuspid valve and near the opening of the coronary sinus;
delays the electrical impulse in order to allow the atria to contract
and complete filling of the ventricles
◉ augmented limb lead.
Answer: Leads aVR, aVL, and aVF; these leads record the difference
in electrical potentioal at one location, relative to zero potential
rather than relative to the electrical potential of another extremity
◉ automaticity.
Answer: ability of a cardiac msucle pacemaker cells to
spontaneously initiate an electrical impulse without being
stimulated frmo another source (such as a nerve)
