Cardiology Flashcards
Which congenital heart defect is associated with uneven blood pressure in each arm?
Coarctation of the aorta
What is eisenmengers syndrome?
Reversal of flow for L to R, due to pulmonary hypertension. Causes de-oxygenated blood to skip lungs and go back around the body
What are the signs/symptoms of Eisenmengers syndrome?
Cyanosis, clubbing, heart failure, syncope, high RBC
Name 3 complications of bicuspid aortic valve?
Infective endocarditis
Aortic Dilation
Aortic regurgitation
In patent ductus arterioles there is a persistent communication between which two structures?
Between proximal left pulmonary artery and descending aorta
Which congenital heart defect presents with a machinery murmur?
Patent ductus arteriosus
What are the 4 components of the tetralogy of fallot?
- A large ventricular septal defect
- Pulmonary stenosis
- Right Ventricular Hypertrophy
- Overriding aorta
Why may toddlers squat in tetralogy of fallot?
Increases total peripheral resistance, so helps alleviate some of the L –> R shunt
What would you see on an X-ray for a patient with tetralogy of fallot?
Boot-shaped heart
Which congenital heart defect is associated with Down’s syndrome?
Atrio-ventricular septal defect
Name a treatment method for pulmonary stenosis?
Baloon valvuloplasty
On ECG what does the PR interval represent?
Delay of AV node to allow ventricles to fill
On ECG what does the ST segment represent?
Beginning of ventricle repolarisation
What does the cardiac axis measure?
Overall direction of the wave of ventricular depolarisation
What would you see in Lead 1 and Lead 3 in right axis deviation?
Lead 1 Negative
Lead 3 Positive
What would you see in Lead 1 and Lead 3 in left axis deviation?
Lead 1 Positive
Lead 3 Negative
Give three causes of left axis deviation?
- LBBB
- Left Ventricular Hypertrophy
- Wolff-Parkinson white Syndrome
What is the most common cause of right axis deviation?
Right ventricular overload, (RVH) or increased strain due to hypertension
Which valvular abnormality is associated with broad and notched M shaped P waves?
P. Mitrale
Mitral Valve Stenosis
What does the heart rate have to be to be classified as bradycardia?
< 60 beats per minute
What does the heart rate have to be to be classified as tacycardia?
> 100 beats per minute
Which of the supra ventricular tachycardias have hidden P waves on ECG?
AVRNT
What type of tachycardia is Wolff-Parkinson White Syndrome?
Atrioventricular re-entrant tachycardia (AVRT)
Name a treatment method for AVRNT?
Catheter ablation - radiofrequency energy directed at slow pathways
What are the ECG changes seen in AVRT?
Short PR Interval, delta wave at start of QRS
What would you see on ECG of patient with AF?
Absent P waves
Irregular and Rapid QRS
Name 4 causes of AF?
Heart failure Thyrotoxicosis (thyroid disease) Alcohol and obesity Valve failure Hypertension
Other than heparin and warfarin in anti-coagulation what else could you use?
NOAC/DOAC - Direct Xa Inhibitors
Rivaroxiban
Name a new treatment method for the early stages of AF?
Pulmonary vein isolation
Name the CHADS2VASc Criteria in assessing risk of stroke in patient with AF?
Congestive HF Hypertension Age, >75 (=2), 65-74 (1) Diabetes Stroke or TIA = 2 Vascular injury Sc- Sex (female)
What does a CHADS2VASc score of 1 mean?
Consider oral anti-coagulation
What does a CHADS2VASc score of 2 mean?
Oral coagulation given eg warfarin or rivaroxiban
What is the acute management of AF?
Electrical (DC shock) or pharmacological (amiodarone) cardioversion
What is the long-term management of AF?
Rate control - BB, CCB or Digoxin
Rhythm Control - Amiodarone or electrical cardioversion + anti-coagulation
What are the ECG changes seen in atrial flutter?
Sawtooth appearance
Narrow QRS complexes
What would you expect the atrial and ventricular heart rate to be in atrial flutter?
Atrial - 300
Ventricular - 150
2:1 Heart block pattern
Name 4 extrinsic causes of bradycardia?
Drugs -BB and Digoxin
Hypothyroidism
Hypothermia
Increased ICP
Name 3 intrinsic causes of bradycardia?
SAN Infarction
Acute Ischaemia
Sick Sinus Syndrome
What is sick sinus syndrome?
Bradycardia due to intermittent failure of the SAN depolarisation due to failure of sinus node to propagate to atria
What would you see on an ECG in someone with Sick Sinus Syndrome?
Long pauses between consecutive P waves
Which type of arrhythmia presents with blackouts?
Heart block
What would you see on ECG in patient with 1st degree heart block?
PR interval prolonged >0.2s
What would you see on ECG in patient with 2nd degree, Mobitz 1 heart block?
Progressive PR interval prolongation then sudden loss of QRS, then pattern re-sets
How would a patient with 2nd Degree Mobitz 1 heart block present?
Diziness, light headed, syncope
What would you see on ECG in patient with 2nd degree mobitz type 2 heart block?
Sudden unpredictable loss of AV conduction and loss of QRS
How would a patient with 2nd Degree Mobitz 2 heart block present?
Chest pain, SOB and postural hypotension
What would you see on ECG in patient with 3rd degree heart block?
P waves and QRS complex appear independently of each other
On auscultation what may you hear in a patient with RBBB?
Wide splitting of the second heart sound
Name 3 causes of RBBB?
- Pulmonary embolism
- IHD
- Atrio-ventricular septal defect
Name 2 causes of LBBB?
- IHD
2. Aortic valve disease
What would you see on an ECG of someone with RBBB?
M wave in lead 1
W wave in lead 5/6
What would you see on an ECG of someone with LBBB?
W wave in lead 1
M wave in lead 5/6
Abnormal Q waves
On auscultation what may you hear in a patient with LBBB?
Reverse splitting of the second heart sound
Name 4 occasions when you would refer someone with an ectopic beat?
- Refractory to beta blockers
- High burden ectopy
- Structural heart defect
- Syncope
What are the 3 main causes of heart failure?
- Ischaemic heart Disease
- Cardiomyopathy
- Hypertension
What is HFREF- Left Heart Failure?
Failure to contract = Ejection fraction <40%
What is HFPEF - Right Heart Failure ?
Inability to relax and fill. Ejection fraction >50%.
What are the 3 main causes of HFREF (LHF)?
IHD, MI and cardiomyopathy
HTN, aortic disease, arrhythmia
What are the 3 main causes of HFPEF - Right heart failure ?
Constrictive pericarditis, cardiac tamponade, pulmonary hypertension, PE, tricuspid regurgitation,
What are the 3 compensatory changes in heart failure?
- Symapthetic stimulation - increase after load by peripheral vasoconstriction
- RAAS - increase after load and preload by salt and water retention
- Cardiac changes: ventricular dilation and myocyte hypertrophy
What is the definition of after load?
The pressure against which the heart must work to eject blood during systole
In which two cardiac conditions would you experience paroxysmal nocturnal dyspnoea?
Heart failure (left sided) Aortic regurgitation
Name 3 signs of LV failure?
- 3rd and 4th Heart sounds
- Crepitations in lung base
- Displaced apex beat
- Weight loss
Name 3 signs of RV failure?
- Hepatomegaly
- Ascites
- Pitting oedema
- Raised JVP
- Pleural effusion
Name 3 symptoms of LV failure?
- Exertional dyspnoea
- Fatigue
- Paroxysmal nocturna dyspnoea
Name 3 symptoms of RV failure?
- Peripheral oedema
- Nausea
- Anorexia