Cardiovascular System

Introduction


Diagnostic accuracy when assessing patients with cardiovascular disease relies heavily on the medical history. Many patients with ischaemic heart disease have few or no physical signs and a characteristic history of peripheral vascular disease may be elicited. Key features in the cardiovascular history are shown in Box 3.1.







img Box 3.1 Important Features in the Cardiovascular History





























































































Chest pain: onset

duration

nature

precipitating factors

relieving factors

distribution and radiation

previous episodes

associated symptoms (nausea, vomiting, pallor)
Breathlessness: on exertion

orthopnoea

paroxysmal nocturnal dyspnoea
Cough: with or without sputum production
Oedema: ankle swelling

swelling of lower limbs and sacral area
Syncope: on exertion

postural

sudden
Calf pain: intermittent claudication
Peripheral vascular disease (PVD): cold peripheries with colour/sensory changes
Others: transient hemiparesis
Visual disturbance: transient (e.g. amaurosis fugax)
Risk factors: smoking

obesity

hypertension

diabetes

hyperlipidaemia

oral contraception
Past history: hypertension

cerebrovascular disease

peripheral vascular disease

congenital heart disease
Medication: antihypertensives

antianginal therapy

statins

oral contraceptives and estrogen replacement therapy (HRT)
Family history: ischaemic heart disease

diabetes

hypertension

hyperlipidaemia





Systematic and thorough examination of the cardiovascular system is a core skill for physicians. Accurate assessment of peripheral cardiovascular signs aids the interpretation of auscultatory findings. Patients with ischaemic heart disease may have few physical signs and physicians should be aware of the likely sites and significance of scars from previous surgical or radiological intervention. Cardiac valvular disease and septal defects usually give rise to murmurs which may be diagnostic. In clinical practice arrival at the final cardiac diagnosis is aided by an electrocardiogram (ECG), chest X-ray (CXR) and echocardiogram (ECHO) and by more complex radiological intervention as appropriate including magnetic resonance imaging (MRI), computerised tomography (CT) and angiography.


General Inspection


Note



  • peripheral or central cyanosis: central cyanosis is accompanied by peripheral cyanosis by definition
  • dyspnoea and orthopnoea
  • malar flush
  • xanthelasmata

Blood Pressure



  • measure the blood pressure lying and standing

Hands


Inspect for



  • clubbing
  • splinter haemorrhages
  • palmar erythema
  • nicotine staining

Arterial Pulses


Palpate



  • radial pulse to assess the rate and rhythm
  • radial and brachial pulses in both arms, comparing right and left
  • carotid pulses
  • radial and femoral pulses simultaneously to assess radiofemoral delay

Rate



  • count radial for at least 15 s if rhythm regular, at least 30–60 s if irregular
  • check the jugular venous pressure (JVP) whilst counting

Rhythm



  • regular (sinus rhythm)
  • regularly irregular (extra or dropped beats)
  • irregularly irregular (atrial fibrillation; the pulse rate is different from the heart rate; listen and count at the apex whilst palpating the pulse)

Volume and character (Table 3.1)



  • collapsing pulse: raise the patient’s arm above the level of the heart whilst holding four fingers over the anterior forearm
  • slow – rising, low volume, alternans, bisferiens and paradoxus by palpating the carotid pulse

Table 3.1 Abnormalities of the Arterial Pulse







































Type Character Seen in
Slow-rising Low amplitude, slow rise, slow fall Aortic stenosis
Collapsing Large amplitude, rapid rise, rapid fall Aortic incompetence; severe anaemia, hyperthyroidism; arteriovenous shunt, heart block, patent ductus arteriosus
Low volume Thready Low cardiac output states; hypovolaemic shock; valvular stenosis; pulmonary hypertension
Alternans Alternate large- and small-amplitude beats (rarely noted in pulse; usually on taking blood pressure) Left ventricular failure
Bisferiens Double-topped (‘notched’) Aortic stenosis with aortic incompetence
Paradoxus Pulse volume decreases excessively with inspiration Cardiac tamponade, constrictive pericarditis, severe inspiratory airways obstruction
Absent radial
Congenital anomaly (check brachials and blood pressure)


Tied off at surgery or catheterisation


Arterial embolism

Jugular Venous Pressure and Pulse (Table 3.2; Fig. 3.1)


The patient should be lying at 45° with the neck relaxed. The JVP is seen welling up between the two heads of sternomastoid in the front of the neck on expiration.


Table 3.2 Raised Jugular Venous Pressure (JVP)




























Character Compression of neck and abdomen Conclusion
Non-pulsatile No change in JVP Superior mediastinal obstruction


• carcinoma of bronchus


• large goitre


• platysmal compression
Pulsatile Jugular vein fills and empties Right heart failure


Expiratory airways obstruction


Fluid overload


Cardiac tamponade


Figure 3.1 (a) Surface markings of the internal and external jugular veins. (b) Jugular venous pulse waveform.

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Mar 14, 2017 | Posted by in PHARMACY | Comments Off on Cardiovascular System

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