Chapter 17 function of the heart

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Which of the following drug is Sympathomimetic

Beta-1 adrenergic agonist

Which of the following is most likely to relieving anxiety induced trachy trachycardia

Beta-1 adrenergic blocker

Excess vagal stimulation to the SA node is most likely cause

Bradycardia

Which term refers to the heart rate less than 60/min

Bradycardia

Ventricular systole refers to

Contraction of the ventricular myocardium

Which term refers to the amount of blood pumped by the heart in one minute

Cardiac output

Milliliters/beat beat/min defines

Cardiac output

Which of the following is most likely to increase stroke volume

A (+) in the trophic drug

Increases afterload thereby increasing the work of the left ventricle

A stenotic aortic valve

A patient in heart failure is given a drug that is classified as a beta adrenergic Agonist. The drug

Activates the beta-1 adrenergic receptors and causes a positive (+) inotropic

Which of the following is most likely to increase ejection fraction

Activation of beta 1 and adrenergic receptors

Which of the following contains 7 mL

An average stroke volume

Which of the following refers to a positive inotropic effect

An increased myocardial contractile force

Decreased blood flow through the coronary arteries is most likely to cause

Angina pectoris

What is the term for the sequence of events that occur during one heartbeat

Cardiac cycle

Heart rate and stroke volume determine

Cardiac output

It's determined by the heart rate and stroke volume

Cardiac output

Milliliters per minute describe

Cardiac output

Which of the following statement is correct about cardiac output

Cardiac output is determined by heart rate and stroke volume

Sympathetic nerve stimulation of The myocardium

Causes a (+) inotropic effect

An ejection fraction of 30% is

Characteristics a failing heart

Which of the following is the most likely consequence of very rapid heart rate

Decreased ventricular filling with blood

Which of the following is an example of forward failure

Diminished renal blood flow stimulates the kidney to decrease urinary output and retain Na+ and water

Which of the following does not happen to a ventricle

Discharge of the vagal nerve

The amount of blood in the ventricle at the end of it phase is the

End of diastolic volume (EDV) The amount of blood in the ventricles at the end of its resting phase. Preload

Which of the following is responsible for Starling effect

End-diastolic volume (EDV) or preload

Furosemide (Lasix), a potent diuretic is administered in acute ventricular failure to

Excrete excess water and relieve the edema

Vagal stimulation to the heart causes

Heart rate to slow

A drug (e.g., atropine) that blocks the vagus nerve

Increases heart rate

Atropine, a muscarinic blocker

Increases heart rate

An increased preload

Increases stroke volume

Increased afterload (e.g., hypertension)

Increases the work of the heart

Increased return of the blood to the heart stretches the heart muscle thereby

Increasing stroke value

Increased Return of the blood to the heart stretches the muscle thereby

Increasing stroke volume

An elevation pulmonary artery pressure is most likely to cause

Left ventricular failure and pulmonary edema

Atropine is a muscarinic antagonist and is therefore used to

Relieve bradycardia

Which of the following is least related to bradycardia

More than 60 beats/ minute

Systole and diastole describe the function of the

Myocardium

Which of the following is descriptive of vagus nerve

Parasympathetic

Which of the following is most accurately describes the vagus nerve

Parasympathetic

Digoxin, a drug used in the treatment of heart failure, increases contractile force and is therefore called a

Positive (+) inotropic agents

Under what condition is the end diastolic volume most likely to increase while ejection fractions decreases

Positive (+) inotropic response

Starlings law of the heart relates force of myocardial contraction with

Preload

Which of the following is the same as end-diastolic volume

Preload

Most of the symptoms of acute left-sided heart failure are

Respiratory in nature (e.g., dyspnea, orthopnea)

Which of the following is most likely consequence of he left ventricular

Pulmonary edema

Jugular vein distention is most associated with

Right-sided heart failure

A drug causes a positive(+) inotropic effect, a negative(-) dromotropic effect and a negative(-) chronotropic effect. What drug response would you except to observe

Slow heart rate

Activation of the muscarinic receptors by acetylcholine

Slows heart rate

Vagal stimulation on the heart

Slows the heart rate

A change in preload causes a change in myocardial contractile Force. This response is known as a

Starlings law of the heart

An increase in venous return causes an increase in cardiac output. This is accomplished by

Starlings law of the heart

What is the term refers to an increase in stroke volume in response to the stretching of the heart

Starlings law of the heart

Cardiac output is determined by heart rate and

Stroke volume

Which term refers to the amount of blood pumped by The ventricle in One Beat

Stroke volume

Increases heart rate

Sympathetic stimulation to the heart

Which of the following is descriptive of a drug that causes a positive (+) inotropic effect a positive(+) dromotrophic effect, and a positive (+) chronotropic effect

Sympathomimetic

What happens during ventricular diastole

The ventricles are filling with blood

Which of the following is least related to tachydysrhymias

Vagal discharge

Which of the following is not likely to cardiac output

Vagal discharge

Decreases preload

Venodilation

Missouri atrial systole the

Ventricles are relaxed


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