Midterm: Lecture 1 Flashcards
Mediastinum
Space between the lungs which contains the heart, the aorta, and vena cava
Percardium
cavity that surrounds heart
Cardiac Innervation:
5th cranial nerve
Valgus nerve responsible for:
Heart rate
Force of each contraction
Cardiac output
Sympathetic NS
Increases heart rate
Increases the force of contraction
“Fight or flight response”
Parasympathetic NS
Decreases heart rate
Reduces force of contraction
Constricts the coronary arteries
Sinuatrial Node:
Positioned on wall of right atrium
Depolarization causing muscle to contract
Automatic nervous system
Average resting cardiac rate
70 beats per min
Range between 60-70
Four vital signs
HR, blood pressure, respiratory rate, and temperature
Factors Affecting Heart Rate
Age Gender Environmental Temperature Infection Physical Activity
Male or womens rest heart rate
Male- 70 bpm
Women- 75 bpm
What is resting heart rate for?
determines one’s training target heart rate zone
infant/neonatal rate of heartbeat
130-150 bpm
toddler’s heartbeat
100-130 bpm
Adolescent heart beat
80-100 bpm
HR Max
220 – age = theoretical maximum based on age
Cardiac Arrythmias
Life threatening medical emergencies
Quite benign and normal
Pulse points
Carotid Femoral Popliteal Radial Brachial Dorsalis Tibialis posterior
Pulse
described by rate, rhythm and volume
Pacemakers
tiny, electrical signals to heart
designed to correct bradycardia
ICD
small device in chest/ abdomen
electrical pulses
Normal BP
Systolic between 90 and 135mmHg
Diastolic between 50 and 90mmHg
Common Types of BP Medication
Diuretics: flush out excess water/ sodium
Beta-blockers: slows down heat to decrease BP
ACE inhibitors: vessels relax
Calcium channel blockers: keeps calcium from entering to make vessels relax
Pulse oximetry
percentage of haemoglobin (Hb) which is saturated with oxygen.
What level should oxygen saturation be at?
above 95%
Cardiac evaluation tools
hx, heart rate, bp, fitness testing etc
CAD (coronary artery disease)
leads to inadequate oxygenation of an area of myocardium and cell death
Blockages cause angina - pain
Angina
most common symptom of CAD
Stable angina
chest pain or discomfort occurring with activity or stress
Unstable angina
less stable, can be warning for heart attack
Most common congenital heart defects
occur in the ventricular septum- Ventriculoseptal defect (VSD).
2 basic valve problems:
Incompetence as a result of poorly functioning valves
Stenosis or narrowing caused by the valve’s inability to open fully
Cardiomegaly
enlarged heart due to hypertrophy by overwork
Congestive heart failure (CHF)
condition in which the heart can’t pump enough blood to the body’s other organs.
Common signs of heart failure
swollen legs or ankles or difficulty breathing.
Sternal Precautions
avoid reaching behind you avoid reaching out to your side avoid stretching arms above head Avoid heavy lifting Avoid pushing/ pulling Two hands better than one
How long are precautions in place?
8-12 weeks
Stress Test
evaluated during exercise or load
Heart Rate Variability (HRV)
the variation of beat-to-beat intervals.
Heart Rate Recovery
Heart rate returns to resting faster for fit person than unfit
HRR : heart rate recovery
difference between a person’s resting heart rate and maximum heart rate.
Calculation of HRR
HRR = HRmax − HRrest
Cardiac Rehab
Supervised program that includes exercise, lifestyle changes, emotional support
Rehab factors
Contraindications
THR zone
Respiratory rate
signs of distress
Methods to measure exercise intensity
Borg Perceived Exertion Scale
Talk Test
Training Heart Rate Zone
Borg Perceived Exertion Scale
exertion best between 12-14
Target Heat Rate:
Receive the most benefit from a workout in a safe way
HR= Hrmax x %intensity
Healthy Heart Zone (Warm up)
50–60% of maximum heart rate:
Fitness Zone (Fat Burning)
60–70% of maximum heart rate:
Aerobic Zone (Endurance Training)
70–80% of maximum heart rate:
Anaerobic Zone (Performance Training)
80–90% of maximum heart rate:
Red Line (Maximum Effort)
90–100% of maximum heart rate:
Some Light-Intensity Activities:
Walking slowly
Golf, powered cart
Swimming, slow treading
Gardening or pruning
Moderate-Intensity Activities
Walking briskly
Golf, pulling or carrying clubs
Swimming, recreational
Vigorous-Intensity Activities
Race walking, jogging or running
Swimming laps
Mowing lawn, hand mower
Tennis, singles