Guide – Practice Questions
with Verified Answers. GRADED
A+. Latest 2026/2027 Update
Which valve open and allow the ventricles to fill - Answer✔✔-Tricuspid and
Mitral valves
The layers of the heart that is damaged during a heart attack is what -
Answer✔✔-Myocardium
The inferior vena cava returns the oxygen blocked to the heart from -
Answer✔✔-Lower part of your body
While the pulmonary veins delivered blood to the - Answer✔✔-Left atria
The ventricle's inherited rate is - Answer✔✔-Between 20 and 40 bpm
The cardiac cycle's two phases are - Answer✔✔-systole and diastole
Depolarization is - Answer✔✔-Cell become less negative and contract
, Which criteria represent of the patient in a normal sinus rhythm - Answer✔✔-
Rate 60-100
Equal interval from the one to another
Each large box, which is five small boxes on the ECG is equal to - Answer✔✔-
0.20 seconds
The P waves represent? - Answer✔✔-depolarization of the atria
The QRS represent - Answer✔✔-Depolarization of ventricles
What is QT interval in this strip - Answer✔✔-Measure from beginning of QRS
complex to the end of the T wave
Lead one shows the difference in electrical voltage between ______and the
AVR Lead as positive pole on _______ - Answer✔✔-Right arm and left legs
Joining lead I , II and III at their ends produce - Answer✔✔-Einthoven's triangle
The V1 electrode is located at______ while the AVL has a positive pull at the
_______ - Answer✔✔-V1- 4th intercostal space
AVL -left Arm
Which is the indication for immediately termination of a stress test -
Answer✔✔-A drop in systolic pressure, dizziness, sweating