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by BlastRoom
Systole and diastole, the conduction pathway, and what each part of an ECG trace represents.
#us_hs_anatomy_physiology
25 questions
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A trace shows a small upward bump, then a tall sharp spike, then a broad rounded wave. What event does the tall sharp spike represent?
On a normal ECG, the first small upward bump appears before the tall spike. What event does that bump show?
After the tall spike, the tracing forms a broader rounded wave before returning to baseline. What event does that rounded wave represent?
The line is nearly flat after the small atrial bump and before the sharp spike. What process accounts for that pause?
After the sharp spike, the tracing stays near baseline before the rounded recovery wave begins. What electrical state does this segment reflect?
An interval starts at the beginning of the sharp spike and ends when the rounded recovery wave returns to baseline. What total activity is being timed?
No separate wave is seen for upper-chamber recovery because it occurs during the tall sharp complex. What event is hidden there?
The flat line after the rounded recovery wave and before the next small bump is the TP segment. What does it show?
A normal beat begins when the sinoatrial node fires. Where does the impulse travel next?
After the signal crosses the upper chambers, which conduction structure receives it and briefly delays it?
The impulse has just left the nodal delay between atria and ventricles. What structure carries it into the interventricular septum?
After the single conduction tract enters the septum, the impulse must divide toward both ventricles. What pathway receives it next?
An impulse has traveled down the right and left bundle branches toward the apex. What network receives it next?
After Purkinje fibers conduct through the ventricular walls, what tissue is directly activated?
During passive filling, pressure in the ventricles is lower than pressure in the atria. What is the valve state?
Atrial systole is pushing the last blood into relaxed ventricles. Which valves are open at that moment?
At the start of ventricular systole, ventricular pressure has exceeded atrial pressure but not arterial pressure. What is the valve state?
During ventricular ejection, pressure in the left ventricle is higher than pressure in the aorta. How are the valve sets positioned?
As ventricles relax, their pressure has fallen below pressure in the aorta and pulmonary trunk but remains above atrial pressure. What happens at the valves?
When relaxing ventricular pressure falls below atrial pressure, what change begins the next filling phase?
A resting trace shows 15 complete cardiac cycles in 12 seconds. What heart rate does that show?
A monitor records 12 complete R-to-R intervals in 10 seconds. What ventricular rate does that show?
An ECG strip covers 6 seconds and contains 9 QRS complexes. What heart rate should be reported?
If one cardiac cycle lasts 0.75 seconds on a resting trace, what heart rate does that show?
A 30-second rhythm strip contains 35 complete cycles. What heart rate does that equal?
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Major Arteries and Veins, Named
40 questions
