if you want to remove an article from website contact us from top.

    counting the number of qrs complexes, which of the following can be interpreted?

    Mohammed

    Guys, does anyone know the answer?

    get counting the number of qrs complexes, which of the following can be interpreted? from screen.

    Which one is correct regarding electrocardiograph (ECG)?

    Click here👆to get an answer to your question ✍️ Which one is correct regarding electrocardiograph (ECG)?

    Question

    Which one is correct regarding electrocardiograph (ECG)?

    A

    P-wave represents the electrical excitation of the ventricle.

    B

    QRS complex represents repolarisation of the ventricles.

    C

    T-wave represents repolarisation of the atria.

    D

    By counting the number of QRS complexes one can determine the pulse rate.

    Medium Open in App Solution Verified by Toppr

    Correct option is D)

    The peak of the QRS complex can be used to calculate the heartbeat of a person. The QRS complex peak in an ECG is indicative of one beat of the heart. Hence, by counting the number of QRS complexes in an ECG one can determine the pulse rate.

    Thus, the correct answer is 'By counting the number of QRS complexes one can determine the pulse rate.'

    Solve any question of Body Fluids and Circulation with:-

    Patterns of problems

    >

    Was this answer helpful?

    4 0

    स्रोत : www.toppr.com

    MCQs on ECG – Electrocardiography or ECG

    Learn about MCQs on ECG topic of Biology in details explained by subject experts on Vedantu.com. Register free for online tutoring session to clear your doubts.

    MCQs on ECG

    Biology MCQs on ECG Download PDF NCERT Solutions

    Popular Textbook Solutions

    CBSE ICSE State Boards Competitive Exams Important Concepts Other

    ECG MCQs

    Is this page helpful?

    ECG or Electrocardiograph is a test that is used to assess the Muscular and Electrical functionalities of the Heart. It is a painless test that can be conducted in a few minutes and results can also be read instantly. An Electrocardiograph is basically a graph of voltage plotted against the time of electrical activity of the heart.

    The electrical activity of the heart - The Electrical System is the power source that makes the working of the heart possible in a Nutshell. The electrical impulses trigger the heartbeat that travels down a pathway through the heart. These pathways are conduction pathways and they are responsible for causing ventricles of the heart to contract and pump out blood. The human heart has a natural pacemaker that produces these electrical impulses all by itself. These electrical impulses generate an electrical current that spreads over our body. An electrocardiogram measures these currents in the form of wave graphs on paper.

    The electrodes of the electrocardiogram are placed on the skin to note the normal working conditions of the heart. These electrodes detect the electrical impulses occurring during each heartbeat. The impulses are picked up from the changes in an electrical path on the skin. These changes arise from the heart muscles and the electrophysiologic patterns of depolarizing.

    Let’s have a look at some solved Multiple-choice questions on ECG

    MCQs on Electrocardiography or ECG

    1. Who developed an Electrocardiogram?

    Wilhelm His Steward Hubert Mann Willem Einthoven Answer: (d)

    2. In the case of a normal Heartbeat, Depolarization stimulus arises in which of the following?

    Epicardium

    Sinoatrial Node (SA node)

    Atrioventricular Node (AV node)

    His bundle Answer: (b)

    3. What does the P wave represent?

    Depolarization of the atria

    Depolarization of the ventricles

    Represents the repolarization of the ventricles

    Depolarization of the atria and ventricles

    Answer: (a)

    4. Which of these cannot be detected by an Electrocardiogram?

    The rate and rhythm of Heartbeats

    The size and position of the Heart chambers

    The function of implanted Pacemakers

    Presence of asymptomatic blockages in the atria of the Heart

    Answer: (d)

    5. Which of the following indicates Ventricular Muscle Depolarization?

    P wave QRS complex T wave PR interval Answer: (b)

    6. What does the T wave represent in an ECG?

    Atrial diastole Atrial systole

    Ventricular diastole

    Joint diastole Answer: (c)

    7. What does the Depolarization of Ventricles initiate?

    Atrial diastole Atrial systole Ventricular systole Joint diastole Answer: (c)

    8. Counting the number of QRS complexes, which of the following can be interpreted?

    Rate of heartbeat Rate of breathing Cardiac output Stroke volume Answer: (a)

    9. What do Depolarization and Repolarization initiate in different chambers of the Heart?

    Contraction and relaxation

    Relaxation and contraction

    Thickening and thinning

    Contraction and thickening

    Answer: (a)

    10. Which of the following waves of ECG represent Repolarization?

    P wave QRS complex RS wave T wave Answer: (d)

    11. In a single circulation the Heart Pumps?

    Oxygenated blood Deoxygenated blood Mixed blood

    Only blood nutrients

    Answer: (b)

    12. The Depolarization Stimulus for the normal Heartbeat originates in the

    Epicardium His-bundle areas

    Atrioventricular (AV) nodal

    Sinoatrial (SA) node

    Answer: (d)

    13. A shortened PR interval, slurring (called a delta wave) of the initial QRS deflection, and prolonged QRS duration are characteristics of

    Wolff-Parkinson-White (WPW) syndrome

    B. Atrial tachycardia

    C.  Left bundle branch block

    D. Myocardial ischemia

    Answer: (a)

    14. The classic ECG changes in Myocardial Infarction (MI. are

    T-wave inversion

    ST-segment elevation

    Development of an abnormal Q wave

    All of the above Answer: (d)

    15. ECG depicts the Depolarisation and Repolarisation processes during the Cardiac Cycle. In the ECG of a normal healthy individual one of the following waves is not represented, which one is that?

    Depolarization of atria

    Repolarization of atria

    Depolarization of ventricles

    Repolarization of ventricles

    Answer: (b)

    16. Which of the following correctly explains a phase/ event in cardiac cycle in a standard Electrocardiogram?

    QRS complex indicates atrial contraction.

    QRS complex indicates ventricular contraction.

    Time between S and T represents atrial systole.

    P-wave indicates beginning of ventricular contraction.

    Answer: (b)

    17. In a normal individual, the heart rate can be determined by the ___________ in an ECG

    Interval between two QRS complexes

    Number of P waves

    Interval between the P and T waves

    Number of T waves Answer: (a)

    स्रोत : www.vedantu.com

    The results of ECG are known as (1) Electrocardiogram (2) Electrocardiograph (3) MRI (4) Biopsy NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

    The results of ECG are known as (1) Electrocardiogram (2) Electrocardiograph (3) MRI (4) Biopsy Practice questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, NCERT Exemplar Questions and PDF Questions with answers, solutions, explanations, NCERT reference and difficulty level

    Select Subject:

    Botany

    Chemistry

    Physics

    Zoology

    « First ‹ Previous 1 (current) 2 3 4 5 6 7 8 9 10 11 › Next » Last

    The results of ECG are known as

    (1) Electrocardiogram

    (2) Electrocardiograph

    (3) MRI (4) Biopsy Q89: 79% From NCERT

    Subtopic:  ECG & Coronary Artery Disease |

    The standard ECG is obtained by connecting the patient to the machine with how many leads?

    (1) 4 (2) 3 (3) 1 (4) 2 Q90: 81% From NCERT

    Subtopic:  ECG & Coronary Artery Disease |

    If one wants to analyse the detailed cardiac activity, the multiple leads are attached to–

    (1) Wrist and arms (2) Abdomen (3) Chest region (4) all the fingers Q91: 68% From NCERT

    Subtopic:  ECG & Coronary Artery Disease |

    What does the QRS complex represent in ECG?

    (1) Atrial Diastole (2) Atrial systole

    (3) ventricular systole

    (4) Joint Diastole Q92: 92% From NCERT

    Subtopic:  ECG & Coronary Artery Disease |

    What does the T wave represents in ECG?

    (1) Atrial Diastole (2) Atrial systole

    (3) ventricular Diastole

    (4) Joint Diastole Q93: 76% From NCERT

    Subtopic:  ECG & Coronary Artery Disease |

    What does the depolarization of ventricles initiate?

    (1) Atrial Diastole (2) Atrial systole

    (3) ventricular systole

    (4) Joint Diastole Q94: 73% From NCERT

    Subtopic:  Rhythmic Excitation of Human Heart: Part 1 |

    By counting number of QRS complex, one may get which information?

    (1) Rate of breathing

    (2) cardiac output (3) Heart beat rate (4) stroke volume Q95: 79% From NCERT

    Subtopic:  ECG & Coronary Artery Disease |

    The deviation from the characteristic ECG indicates a possible abnormality; this information can be utilized in which field of Biology?

    (1) Clinical Biology

    (2) Biotechnology

    (3) Molecular Biology

    (4) Pedigree analysis

    Q96: 87% From NCERT

    Subtopic:  ECG & Coronary Artery Disease |

    Depolarisation and repolarisation actually initiate ___________ in different chambers of heart?

    (1) contraction and relaxation

    (2) relaxation and contraction

    (3) thickening and thinning

    (4) thinning and thickening

    Q97: 91% From NCERT

    Subtopic:  Rhythmic Excitation of Human Heart: Part 1 | Rhythmic Excitation of Human Heart: Part 2 |

    Three lead configuration of ECG has arrangement?

    (1) one to each wrist and one to right ankle.

    (2) one to each ankle and one to right wrist.

    (3) one to each wrist and one to left ankle

    (4) one to each ankle and one to left wrist.

    Q98: 82% From NCERT

    Subtopic:  ECG & Coronary Artery Disease |

    Select Subject:

    Botany

    Chemistry

    Physics

    Zoology

    « First ‹ Previous 1 (current) 2 3 4 5 6 7 8 9 10 11 › Next » Last

    स्रोत : www.neetprep.com

    Do you want to see answer or more ?
    Mohammed 5 month ago
    4

    Guys, does anyone know the answer?

    Click For Answer