| Causes                  | History                  | Assessment &   Investigations                  | 
                    
                                      
            | Cardiac                  | 
                    
                                      
            | Myocarditis                 |                     
                    Non-specific symptoms mimicking   respiratory disease or sepsisRecent viral illness eg coxsakie,   parvovirus, influenzaRecent (1-14 days post) mRNA vaccine   received (higher risk adolescent males and after 2nd dose)Dizziness or syncopeFeelings of palpitations |                     
                    Abnormal BP and or heart rateECG changes possible (eg sinus   tachycardia, non-specific ST segment and T wave changes)CXR changes possibleTroponin raise possibleCRP / ESR raise possible(see                                                   
                        COVID-19)    | 
                    
                                      
            | Pericarditis                 |                     
                    Retrosternal chest painPain improved by sitting upright or   leaning forwardRecent (1-14 days post) mRNA vaccine   received (higher risk adolescent males and after 2nd dose) |                     
                    TachycardiaPericardial rubECG changes possible (eg diffuse ST   elevation with PR depression; T wave flattening; deep symmetrical T wave   inversion)CXR changes possible (if effusion   present)Troponin raise possibleCRP/ESR raise possible(see                                                   
                        COVID-19)    | 
                    
                                      
            | Endocarditis                 |                     
                    Fever of unknown originCongenital or acquired cardiac   conditionCardiac surgery historyValvulopathy or replacementAboriginal or Torres Strait IslanderRecent dental procedureRecent skin infection or procedure |                     
                    Dukes Criteria for IECXR changes possibleCardiac echo    | 
                    
                                      
            | Aortic   dissection                 |                     
                    Acute onset ‘tearing’ chest painPain radiates to backKnown connective tissue disease eg   Marfan, Ehlers-DanlosHistory of Kawasaki diseaseKnown aortic root dilatation |                     
                    New murmur with no alternative aetiologyDifference in BP’s upper limbsPericardial effusionPleural effusionCXR changes possible | 
                    
                                      
            | Arrhythmias                 |                     
                    PalpitationsExertional chest painSyncopeDizzinessFamily history of arrhythmias eg   BrugadaFamily history of sudden cardiac death |                     
                    Abnormal BP +/- heart rateECG abnormalities possibleElectrolytes abnormalities    | 
                    
                                      
            | Cardiac   ischaemia                 |                     
                    Pain radiating to arm or neckBlunt chest traumaCocaine, methamphetamine or synthetic   cannabinoids useKnown cardiac disease or cardiac   surgeryKawasaki disease historyHypercoagulability history eg SLEHyperlipidaemia history or family   historyLong standing diabetes history |                     
                    Abnormal BP and or heart rateArrhythmiasECG changes (ST and T wave changes)Raised troponin   | 
                    
                                      
            | Pericardial   effusion                 | Screen   for risk factors:                     
                    infective (recent viral, bacterial, TB,   fungal)auto-immune history eg lupusneoplastic eg neoplasticpost procedure (recent cardiac /   thoracic surgery)post MI (unlikely paediatrics)uremic (chronic renal failure,   especially if pre-dialysis stage)recent treatment radiationdrugs (rare) |                     
                    HypotensionDistended neck veinsMuffled heart soundsCXR changes possible | 
                    
                                      
            | Pulmonary                 | 
                    
                                      
            | Pulmonary embolus                 |                     
                    Recent surgery or immobilityMalignancyHyepercoagulability historyCVAD in situ or recentPleuritic painHaemoptysisDyspnoea |                     
                    Hypoxia with no other causeTachycardia with no other causeTachypnoea with no other causeECG changes possible (eg tachycardia,   RBBB, right sided T wave changes)CXR changes possible | 
                    
                                      
            | Pneumothorax                 |                     
                    Tall/thin adolescentsAcute pain or dyspnoea after   cough/Valsalva manoeuvreAcute onset, severe, stabbing chest   painCan be pleuritic |                     
                    Can have normal examSweatingTachypnoea and or tachycardiaDecreased/absent breath soundsHyper resonance on percussionAsymmetric lung expansionCXR changes    | 
                    
                                      
            | Acute Chest   Syndrome                 |                     
                    Known sickle cell diseaseCurrent or recent infection,   dehydration, fever, hypoxia, sedatives or surgery |                     
                    Fever/dehydration signsTachypnoea/tachycardiaCXR changes possible   | 
                    
                                      
            | Exercise   Induced Asthma                 |                     
                    Exercise induced chest pain with   dyspnoea/coughPrevious history asthmaOther atopic historySalbutamol responsive |                     
                    TachypnoeaTalking short sentencesHypoxiaWidespread wheeze   | 
                    
                                      
            | Pneumonia                 |                     
                    FeverCoughIncreased WOB |                     
                    LethargicFeverTachypnoea and WOBHypoxiaLocalised crackles or absent breath   sounds   | 
                    
                                      
            | Pleural   Effusion and Empyema                 |                     
                    Chest pain, can be pleuriticFever >48 hrs despite antibioticsLethargyDyspnoea/WOBUnilateral chest painRefusal to lie on one site |                     
                    Localised decreased air entryLocalised dull percussionDecreased chest expansionApparent scoliosis (due to   pain/muscle spasm)CXR changes   | 
                    
                                      
            | Pleurisy                 |                     
                    Sharp stabbing localised chest painPain worse with deep breathing,   coughing, movement, certain positions (pleuritic)May have recent or current cough or   feverMay be entirely well apart from new   pleuritic chest pain |                     
                    May hear pleuritic rub over area of   chest painCXR normal (unless underlying condition   causing pleuritic pain eg pleural effusion)   | 
                    
                                      
            | Inhaled   Foreign Body                 |                     
                    High degree suspicion children                                                   
                        <4   years ageHigh degree suspicion older children   with developmental impairmentMight present days to weeks after eventPersistent cough,fever, wheeze or consolidationHaemoptysisIncreased WOB/stridorColour changes if acute event |                     
                    May have normal examStridor/voice changesTachypnoeaHypoxiaFocal wheezeLocalised decreased air entryAsymmetrical chest movementCXR might appear normal, look for air   trappingAsk for inspiratory, expiratory and   lateral decubitus views   | 
                    
                                      
            | Musculoskeletal                  | 
                    
                                      
            | Muscle   Strain / Trauma                 |                     
                    Recent traumaRecent overuse (ask about activities,   hobbies, jobs)Chronic coughLocalised area of chest painWorse with movement or deep breathing |                     
                    Localised area or muscle groups of   tendernessReproducible with palpation, movement,   deep breathingBruising   | 
                    
                                      
            | Precordial   Catch                 |                     
                    Sudden and sharp onset chest painPain along left lower sternal border or   cardiac apex areaOnset can be during rest or activity   but not during sleepThe episode can lead to shallow   breathing as a way to cope with pain and feelings of intense anxiety due to   painEpisodes are intense but brief lasting   30 seconds to 3 minutes |                     
                    Normal examNo special investigations | 
                    
                                      
            | Costochondritis                 |                     
                    Sharp or dull chest painGradual or rapid onsetPin point area to 2 or 3 adjacent ribsReproducible with palpation, movement   or deep breathing |                     
                    Tenderness to palpation of   costochondral junctions Reproducible localised pain or discomfortUsually unilateralUsually ribs 2 to 5No swelling                     | 
                    
                                      
            | Bone   destruction:                                         
                    Osteomyelitis   /
 Bone   neoplasm
 |                     
                    Localised chest painCan be subacute or chronic painNight time pain or awakening from sleepPain persisting after minor trauma |                     
                    May be well clinicallyNon-specific localised bony   tendernessLocalised soft tissue swellingCXR changes possible   | 
                    
                                      
            | Gastro-intestinal                  | 
                    
                                      
            | Gastro-oesophageal reflux/ oesophagitis                 |                     
                    HeartburnNon-specific chest painEpigastric discomfort or painRecurrent vomitingOdynophagiaFood refusal |                     
                    Possible epigastric   discomfort/tenderness | 
                    
                                      
            | Other                  | 
                    
                                      
            | Breast   tenderness                 |                     
                    Localised to breast tissue areaPremenstrual or cyclic:  PMSNon-cyclic pain: consider   fibro-adenoma, breast cyst or breast abscess |                     
                    Breast lump right under the areola =   breast budOther features puberty supports breast   bud diagnosisConsider ultrasound if breast pathology   suspectedFever, redness or axillary lymphadenopathy   indicates possible infection  | 
                    
                                      
            | Shingles                 |                     
                    Prodrome of pain or hyperalgesia over   one or more dermatome that does not cross midlineHistory of previous shinglesConfirmed contact |                     
                    If rash present: clusters of vesicles   on red bases that is confined to one more dermatome that does not cross   midline | 
                    
                                      
            | Psychogenic                 |                     
                    Mental health historyDrug/alcohol useSocial stressorsConsider HEEADSSS screen |                     
                    Transient hyperventilation +/-   tachycardiaNormal examNormal ECG   |