If SA node (=natural pacemaker) fıring rate is 100 potentials per minute, but resting heart rate of a person is 75bpm, what accounts for the difference?

Q: during a procedure, a patient's end diastolic volume was found to be 127mL. The end systolic volume…

A: In the human circulatory system, the heart is considered the central organ that plays a significant…

Q: Describe the events leading up to contraction in a cardiac contractile cell. (Where does the…

A: Cardiac muscles are similar to skeletal muscles with a few differences:-a) Contraction is…

Q: Describe the association of ECG tracings with electrical events occurring in the heart

A: An electrocardiogram (ECG or EKG) is a recording of the heart’s electrical activity as a graph over…

Q: What is the effort of different types/intensity of exerise on heart rate

A: We can measure exercise intensity using target heart rates, the talk test, or the exertion rating…

Q: Given the following cardiac performance data, Cardiac output (CO) 5 5400 mL/min Heart rate (HR) 5 75…

A: Introduction: Ejection fraction is a method for quantifying cardiac contractility. It has a value…

Q: Given heart rate = 72 bpm, stroke volume = 70 mL, calculate cardiac output.

A: Stroke volume: All the blood from body enters into right atrium from where it is pumped into right…

Q: Define Starling law of the heart

A: The heart is the blood regulating organ of the body. It contains pericardial walls and blood vessels…

Q: Upward deflection due to ventricular repolarization = P wave O PR interval O QRS complex O Twave

A: Electro Cardiogram ECG is a device that measures the impulse of the heart. It specifically tests the…

Q: On an ECG, which of the following is generally produced from myocardial ischemia? Group of answer…

A: ECG is a diagnostic test known as Electrocardiogram which is used to check the heart's rhythm and…

Q: Based on your data, how was your heart rate different during the first and last 10 seconds…

A: Heart rate is the pounding of the heart in one minute. Normal heart rate is -60 to 100beats /…

Q: Discuss that main factors that control heart rate?

A: We know that, Carotid arteries carry blood from the heart to the brain. They branch off from the…

Q: Individual A B C Resting Heart Rate (beats/min) 70 98 35 Stroke Volume (ml/beat) 70 50 140 Cardiac…

A: Heart is the major organ of blood pumping and circulation.  It sends oxygenated blood to different…

Q: Where on an EKG tracing do you evaluate ST-segment changes?

A: An electrocardiogram (ECG) is a simple test that checks the rhythm and electrical activity of your…

Q: Define the term isovolumetric ventricular relaxation?

A: The term isovolumetric ventricular relaxation (IVR) is related to the cardiac cycle. The cycle…

Q: If the S-A node discharges at 0.00 seconds, when will the action potential arrive at ventricular…

A: When an electrical impulse is generated in the heart, it initiates at the sinoatrial (S-A) node,…

Q: ich of the following is an accurate descriptione d the subsequent (second) P wave (second cardi

A: Measuring rate and regularity of heartbeat, size, and shape by electrocardiograph, detect tiny…

Q: If you were to look at an ECG trace of a 65-year-old male who has recently being diagnosed with a…

A: An electrocardiogram is used to records the electrical signals in our heart. It's a common and…

Q: Should Jhon expect any variation to the normal values of the heart rate knowing that the patient in…

A: Flight or fight mechanism is our body's automatic mechanism which prepares our body to accept or…

Q: A person with a heart rate of 40 has no P waves but normal QRS complexeson the ECG. Explain?

A: PQRS are the heart waves, P wave shows the depolarisation and QRS impulse through ventricles.

Q: splanchnic, cutaneous, and skeletal muscle vascular beds during sustained exercise (distance

A: The amount of blood pumped by the left ventricle in a minute is called as the cardiac output. It's…

Q: List the normal value for resting heart rate

A: The human circulatory system or the blood vascular system consists of a muscular chambered heart, a…

Q: Write the word formula relating cardiac output, heart rate, and stroke volume. Give normal values…

A: Cardiac output (CO) is defined as  amount of blood pumped per minute by each ventricle. Number of…

Q: What causes the pacemaker cells of the SA node to trigger an action potential?

A: The heart is made up of cardiac muscle. It contains a network of specialized cardiac muscle fibres…

Q: Starling's law of the heart ?

A: Starling law is commonly known as frank-starling law. Which is related to the heart and its…

Q: Define the terms depolarization and repolarization with respect to heart’s activity.

A: Cardiovascular action is a short-term change in voltage i.e. the power of the membrane throughout…

Q: What is the relationship between the elapsed time (Delta T) between R wave (R-R Interval) and the…

A: Heart rate refers to the number of times the heart beats per minute (bpm). It is a measure of the…

Q: 270-0980 CAAPHIE CONTROL

A: This is sinus bradycardia rhythm  Becouse  between two RR interval  have 6 large square box so heart…

Q: What is the most accurate way to calculate resting heart rate?

A: The resting heart rate refers to the rate at which the heart is pumping the blood when the body is…

Q: Name the neurotransmitter released from parasympathetic nerve endings and what effect does this…

A: Neurotransmitters are body's chemical messengers used by the nervous system to transmit messages…

Q: Elma, an athlete, has a low resting heart rate of 60 heartbeats per minute. Her resting cardiac…

A: Heart is the principal organ of the cardiovascular system. In addition to the heart it includes the…

Q: Find the Q10 values from 10-20°C and 20-30°C (given heart rates in bpm at 10°C = 5bpm, 20°C = 10bpm,…

A: The temperature coefficient (Q10) represents the factor by which the rate (R) of a reaction…

Q: Why is ventricular fibrillation such a serious arrhythmia?

A: Introduction: The term ‘arrhythmia refers to an abnormal condition of the heart in which the rate…

Q: Let's review the electrical events that occur during a heartbeat. Match each phase of the ECG in the…

A: A. The atria depolarize ( P wave)B. The ventricles repolarize (T wave)C. (Diastolic interval; the…

Q: In a cardiac contractile cell what is the mechanism involved in the change in membrane potential?…

A: The cardiac contractile cell undergoes various changes in order to perform several activities and…

Q: On an ECG erratic waves indicates. and is associated with O ventricular fibrillation, second-degree…

A: A human heart is a four-chambered muscular organ that is used to pump blood to different parts of…

Q: Why is the Frank-Starling law of the heart important to the understanding of heart failure?

A: Frank starling law is a law that defines the relation between end diastolic volume and stroke…

Q: Number of double circulations completed by the human heart per minute under resting conditions is

A: Components of closed circulatory system It consists of heart to pump the blood, blood vessels like’s…