Pathology of Cardiovascular System Flashcards

1
Q

List the common and important diseases affecting the heart and vascular tree (6)

A
• Ischaemic heart disease 
• Hypertensive heart disease 
• Congenital heart disease 
• Valvular heart disease
• Infective endocarditis 
• Rhythm disturbances – Based on ECG
➢ Idiopathic long QT syndrome 
➢ Coronary Acute Syndrome – ST segment change
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2
Q

What is the disease associated with the symptom - chest pain

A

Ischaemic heart disease, pericarditis – inflammation of
the pericardium, aortic dissection – tear in aorta,
respiratory, GI, muscular

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3
Q

What is the disease associated with the symptom - Breathlessness – Shortness of breath on exertion,
orthopnoea, paroxysmal nocturnal dyspnoea, wheeze

A

Heart failure, ischaemia, respiratory

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4
Q

What is the disease associated with the symptom - palpitations

A

Rhythm disorders, functional problem – hypertrophies,

anaemia – causing ↓ blood O2, hyperthyroidism

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5
Q

What is the disease associated with the symptom - Syncope

A

Rhythm disorders, valvular disease, vasovagal, postural

hypotension, neurological

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6
Q

What is the disease associated with the symptom - fatigue

A

Heart failure

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7
Q

What is the disease associated with the symptom - Oedema, organomegaly

A

Heart failure, valvular disease

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8
Q

What is the disease associated with the symptom - cyanosis

A

Congenital heart disease, left heart failure

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9
Q

What is in the general examination for CVD (5)

A
General 
Face 
Hands 
Pulse 
Precordium
Peripheral Vascular status
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10
Q

What are you looking for in the GENERAL examination for CVD

A
❖ Age & sex, rich/poor 
❖ Cared/Uncared for 
❖ Obesity/Cachexia 
❖ Pallor/Cyanosis/Jaundice sclera
❖ Comfort/Breathlessness
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11
Q

What are you looking for in the FACE examination for CVD

A

❖ Pale/Plethoric – Red faced
▪ MALAR FLUSH is the redness of cheeks seen in MITRAL STENOSIS – causes CO2 RETENTION & VASODILATION
❖ ARCUS SENILIS
▪ Lipid deposits that occur due to hypercholseterolemia
▪ Pale ring at the periphery of the iris
❖ XANTHALESMA
▪ Yellow plaques at inner part of the eye
▪ Can be an indication of hyperlipidemia, but not always
❖ Mouth breathing
▪ Due to apnoea

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12
Q

What are you looking for in the HAND examination for CVD

A

❖ Cold/Warm
❖ Finger clubbing
▪ ↑ in soft tissue around the ends of fingers & toes causing nail base to become convex
▪ Occurs in cyanotic CHD, right to left shunts, bacterial endocarditis
❖ Palmar creases
▪ Pale indicate anaemia
❖ Splinter haemorrhages
▪ Indication of thromboembolic phenomenon, trauma, bacterial endocarditis
❖ Tobacco staining
▪ Indicates high risk of atherosclerosis

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13
Q

What are you looking for in the PULSE examination for CVD

A

❖ ARTERIAL pulse obtained at right radial artery
❖ Rate
▪ Beats/minute (BPM) – should be an EVEN number
❖ Rhythm
▪ Regular or irregular? Regularly irregular?
► Seen in sinus arrhythmia, second degree heart block
o Irregularly irregular
► Seen in atrial fibrillation

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14
Q

What are the investigations used for CVD (6)

A

• Blood pressure
➢ Measure SYSTEMIC BP & JUGULAR VENOUS PRESSURE
➢ ↑ JVP indicates RIGHT HEART FAILURE

• Auscultation
➢ Listen to RATE and any NEW/CHANGING MURMURS

• Chest X-ray
➢ Identify SIZE of heart and CALCIFICATION (normally on valves)

• Fluoroscopy
➢ Identify ARTERIES (stenosis) & PATENCY

• ECG

• Echocardiography
➢ Observe blood FLOW & DYNAMICS

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15
Q

What are the macroscopic changes in ischemic heart disease?

A

➢ Infarcted area becomes PALE
➢ 12 months post MI (assuming survival):
▪ Infarcted area replaced with fibrous tissue is thinner as does NOT CONTRACT – not bulky
▪ DILATION of ventricle due to inefficient pumping

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16
Q

What are the microscopic changes in ischemic heart disease?

A

➢ Tissue becomes NECROTIC → INFLAMMATORY CELL INFILTRATION

(macrophages, fibroblast, neutrophils) → GRANULATION TISSUE → FIBROSIS

17
Q

What are the 2 types of MI

A

➢ ST elevation MI

➢ Non-ST elevation MI

18
Q

What are the 2 main anatomical patterns of MI

A

Transmural myocardial infarction

Subendocardial myocardial infarction

19
Q

What is transmural myocardial infarction?

A

OBSTRUCTION or OCCLUSION of a coronary
artery
FULL thickness damage to cardiac muscle Seen as a ISCHAEMIA throughout the DIAMETER of the artery

20
Q

What is subendocardial myocardial infarction?

A

GLOBAL HYPERPERFUSION of ALL 3 coronary
arteries
Can occur when patients lose blood → cannot
maintain BP → flow to heart is reduced
PARTIAL thickness damage to cardiac muscle
Seen as PATCHY ischaemia underneath the
MYOCARDIUM

21
Q

What is the macroscopic appearance of infective endocarditis?

A

Yellow plaque attached to atrium

Plaque present in left atrium and valves

22
Q

What is the macroscopic appearance of atherosclerosis?

A

Aorta MAINTAINS FLOW by acting as shock absorber
Aorta reserves energy to CONTRACT when heart is in
DIASTOLE
Plaque build-up HARDENS artery, causes DILATION and LOSES ELASTICITY

23
Q

How would you prepare for, prevent and manage emergencies in the dental surgery?

A

❖ Patient may collapse from angina or MI as anxious
❖ Local Anaesthetic:
▪ Adrenaline in LA is used to make the LA more PROFOUND
▪ 1/80 000 part adrenaline in Lignocaine, does not cause heart palpitations
▪ Scandanest (no adrenaline) is used to prevent litigations

24
Q

How would you anticipate and avoid exacerbating the medical comorbidity, in particular through drug interactions

A

❖ Analgesic with anti-coagulants

25
Q

How would you modify the treatment plan to take account of limitations in dental treatment options in the face of
the medical status

A

❖ Suturing of pockets in patients on anti-coagulants