Cardio-Pulmo Flashcards
(153 cards)
Which of the following organs has the highest percentage of
oxygen extraction?
A) Kidney
B) Skin
C) Heart
D) Intestine
C) Oxygen
extraction can be assessed by the ratio of oxygen delivery and oxygen consumption in any organ system of the body. The heart has the highest percentage of oxygen extraction.
Cardiac output is defined as a product of which of the following
components?
A) Heart rate and stroke volume
B) Stroke volume and oxygen consumption
C) Ejection fraction and aerobic capacity
D) Myocardial oxygen capacity and heart rate
A) Heart rate and stroke volume
Which of the following is a physiologic measure expressing the
energy cost of physical
activities?
A) Metabolic oxygen consumption
B) Mean exercise training
C) Measure of exercise tolerance
D) Metabolic equivalent (MET) of task
D) Metabolic equivalent (MET) of task
Which of the following is not a proven therapeutic benefit of cardiac rehabilitation after a myocardial infarction (MI)?
A) Increased resting cardiac output
B) Decreased rate of recurrent MI
C) Improved left ventricular (LV) function
D) Decreased mortality
A) Increased resting cardiac output
Although cardiac rehabilitation increases maximum cardiac output, it does not increase resting cardiac output. Cardiac rehabilitation has been shown to reduce the rate of recurrent MI by 17%, decrease mortality secondary to MI by
15% to 20%, and increase LV ejection fraction after MI.
Which of the following is the medically acute inpatient cardiac rehabilitation phase? A) Phase 1 B) Phase 2 C) Phase 3 D) Phase 4
A) Phase 1
is the first acute inpatient rehabilitation phase that can last from 1 to 14 days. The focus of this phase is to closely monitor the patient while increasing metabolic equivalents (MET) by 1 to 2 each day until a MET of 4 is reached. This should start on the acute care fl oor, usually in the CCU, and continue in acute rehabilitation. Cardiac patients should not wait to start therapy until they are on the rehabilitation floor. Phases are tailored to the individual. It is possible to skip Phase 1 in some patients and go directly to Phase 2 (intermediate outpatient phase after a noninvasive procedure).
Which of the following is a useful tool in measuring exertion during a physical activity?
A) Wong-Baker scale
B) Borg scale
C) Ranchos Los Amigos scale
D) Disability rating scale
B) The Borg scale
is a widely used scale that quantifies exertion by the patient and help tailor rehabilitation for the patient.
In which of the following diseases should target heart rate not be
used as a guide for exercise tolerance?
A) Heart transplant
B) Diabetes
C) Post–myocardial infarction
D) Gout
A) Patients with heart transplant
lack vagal innervation to
the heart, resulting in a higher baseline heart rate and slow return to baseline after exercise. Another cause of a baseline heart rate post transplant is antirejection medication.
Rate control is mediated mostly by hemodynamic changes and catecholamines
Which of the following is included in the goals of cardiac rehabilitation?
A) Greater exercise tolerance
B) Long-term exercise plan
C) Smoking cessation
D) All of the above
D) All of the above
How does the heart physiologically compensate for increased end-diastolic volume?
A) Increased peripheral resistance
B) Increased respiratory rate
C) Increased systolic contractility
D) Decreased systolic contractility
C) Increased systolic contractility
The Frank-Starling law is an important concept to understand in patients undergoing cardiac rehabilitation. The law states that when venous return and the end diastolic volume increase, the force generated by the myocardium increases resulting in a higher stroke volume. This law is particularly important in heart transplant patients, where the heart
compensates to change in demand primarily due to hemodynamic
changes and catecholamines rather than autonomic innervation.
In the case of increased afterload, the heart reduces stroke
volume to compensate. Recall here that cardiac output is the
product of stroke volume and heart rate
Which of the following phases of cardiac rehabilitation is
considered a structured outpatient program?
A) Phase 1
B) Phase 2
C) Phase 3
D) Phase 4
B) Phase 2
is a supervised ambulatory outpatient program lasting 3 to 6 months. An exercise tolerance test is usually performed at this phase to guide further rehabilitation. This is the immediate outpatient phase that requires a higher level of monitoring.
Which of the following exercises are allowed during Phase 1 of cardiac rehabilitation?
A) Isometric exercises
B) Valsalva maneuvers
C) Raising legs above the heart
D) Dangle legs off bed
A) Isometric exercises
can raise the heart rate and demand on the heart. Although isometric exercises are initially held during cardiac rehabilitation, they are introduced later in short durations to condition the heart to handle increased demand. Valsalva maneuvers can cause arrhythmias and should be avoided in the acute phase of cardiac rehabilitation. Raising the legs above the heart can increase preload
Which of the following populations of patients has a higher energy cost during ambulation?
A) Prosthetic lower extremity
B) Peripheral vascular disease
C) Smoker
D) Diabetic
A) Prosthetic lower extremity
How can cardiac rehabilitation benefit a patient with angina
pectoris?
A) Increase myocardial oxygen consumption
B) Decrease the maximum heart rate
C) Change angina threshold
D) Improve efficiency
D) Improve efficiency
Which of the following patients will not be a candidate for rehabilitation on the basis of target heart rate?
A) Patient taking a statin
B) Patient taking a beta-blocker
C) Patient undergoing anticoagulation therapy
D) Patient taking a diuretic
B) Patient taking a beta-blocker
Which of the following components shows an increase in response to exercise training?
A) Heart rate
B) Myocardial oxygen capacity
C) Stroke volume
D) Peripheral resistance
C) Stroke volume
Stroke volume increases at rest and during exercise,
whereas heart rate decreases in response to exercise therapy.
Which of the following exercise phases is important to prevent
syncope?
A) Aerobic phase
B) Anaerobic phase
C) Cool-down phase
D) Stretching phase
C) Cool-down phase
Patients undergoing cardiac rehabilitation are at
a higher risk for postexercise hypotension or even syncope if a slow cool down phase is not incorporated into the exercise regiment. The heart continues to generate a higher cardiac output based on the increased demand during the conditioning phase and an abrupt stop in exercise may result in a drop in blood pressure causing
hypotension.
What is the target heart rate for a patient with stable arrhythmias during cardiac rehabilitation?
A) Maximum heart rate
B) Heart rate below the rate where arrhythmias
C) Heart rate 10 to 20 beats above the rate where arrhythmias are
noted
D) Patient is not a candidate for cardiac rehabilitation
B) Heart rate below the rate where arrhythmias
The goal of therapy for a patient with frequent stable arrhythmias is to condition the body to increase efficiency while maintaining the pulse under the heart rate where arrhythmias frequently occur.
How would postsurgical cardiac rehabilitation be different patient with intermittent vascular claudication?
A) Interspersed rest periods between exercises
B) Target heart rate to be set at 90% of maximum heart rate
C) Higher dosage of anticoagulation
D) Patient is not a candidate for cardiac rehabilitation
A) Interspersed rest periods between exercises
Which of the following phases begins when the patient has
plateaued in exercise
endurance?
A) Phase 1
B) Phase 2
C) Phase 3
D) Phase 4
D) Phase 4
The maintenance phase, also known as Phase 4 of cardiac rehabilitation, focuses on maintaining the goals met during the initial phases of rehabilitation by incorporating a home exercise program and continuing risk factor management. Initial gains made during the first three rehabilitation phases may decrease with time if the patient does not continue with exercises to
maintain conditioning.
Which of the following is considered to be the greatest single modifiable risk factor for cardiac disease?
A) Obesity
B) Hypertension
C) Hyperlipidemia
D) Smoking
D) Smoking
Which of the following phases of cardiac rehabilitation focuses
on determining the maximum exertion to be performed by the patient?
A) Phase 1
B) Phase 2
C) Phase 3
D) Phase 4
C) Phase 3
After the closely monitored outpatient Phase 2 cardiac
rehabilitation and determination of hemodynamic ability of the heart with exercise tolerance testing, Phase 3 begins. This phase sets a higher target heart rate for the patient and sets a goal to maximize the therapeutic benefit of cardiac rehabilitation before the maintenance phase begins.
Which of the following positions would have the highest stroke
volume?
A) Exercising in supine position
B) At rest in supine position
C) Exercising in prone position
D) At rest while standing
B) At rest in supine position
Which of the following is not an absolute contraindication for
cardiac rehabilitation?
A) Hypertrophic cardiomyopathy
B) Active pericarditis
C) Resting systolic blood pressure greater than 200
D) Third-degree heart block without pacemaker
A) Hypertrophic cardiomyopathy
The coronary arteries mostly perfuse the myocardium during
which heart phase?
A) Systole
B) Diastole
C) Mid-systole
D) End-systole
B) Diastole