…the absence of pupillary light reflex immediately post cardiac arrest is more equivocal. Various pharmaceutical agents, including epinephrine—administered to the vast majority of cardiac…

…Sudden and unexpected cardiac arrest with loss of mechanical cardiac function. Results in loss of consciousness, cessation of breathing, and absence of a palpable pulse…

…performed, fibrinolytic therapy is recommended within 12 h of symptom onset in patients without contraindications. I A In the absence of ST segment elevation, primary…

…Initial evaluation of bradycardia according to ABCDE. Symptoms of bradycardia Bradycardia may be an incidental and asymptomatic finding. The absence of symptoms indicates that the…

…and hibernating myocardium, at the expense of higher radiation exposure and blurrier images. The absence of thallium uptake indicates non viable myocardium, while redistribution into…

…dawn of the 20th century, widespread acceptance was delayed, partly due to autopsy studies demonstrating an absence of coronary thrombi in a significant proportion of…

…a high probability of unstable angina (UA), and patients whose initial findings are less definitive. The defining electrocardiographic feature is the absence of persistent ST…

…should be available within the recommended interval before elective surgery. In the absence of malfunction, a pacemaker should have been checked within the preceding 12…

…a non ischemic ECG (absence of ST T changes) during chest pain caused by myocardial ischemia. This is corroborated by millions of exercise stress tests…

…R waves: R wave ≥0,04 s in V1 V2 and R/S ratio ≥1 with concordant positive T wave in absence of conduction defect…

…A diagnosis of MI should not be made solely from an abnormal cTn concentration in the absence of evidence of ischaemia. Classification of myocardial infarction…

…during the examination. Work related musculoskeletal disorders are a common cause of pain and sickness absence for ultrasound practitioners (Harrison et al). When performing emergency…

…Occlusion Myocardial Infarction (OMI) versus Non Occlusion Myocardial Infarction (NOMI). This method focuses on the presence or absence of ACO, rather than rigid ECG thresholds…

…history, a positive Dix–Hallpike test and the absence of other neurological findings. The treatment is a repositioning manoeuvre. Indications Brief attacks of vertigo, seconds…

…Diagnosis of a tension pneumothorax can be made via auscultation, where asymmetric lung sounds are noted, specifically with an absence of sounds on the affected…

…manifesting externally or concealed internally, account for approximately half of all traumatic cardiac arrests. In the absence of evident hemorrhage, potential etiologies to consider include…

…to the angiographic appearance of the treated epicardial artery, because the defining abnormality is inadequate distal perfusion in the absence of a major residual epicardial…

…onset of physical activity. D: Sinus bradycardia with heart rates between 50 60 beats/min always indicates a pathological condition. Explanation: In the absence of…

…bradycardia in the absence of a pacemaker. Hypersensitivity to adenosine. Administration Normal route : Peripheral intravenous (IV). Alternative route : Central venous administration of adenosine is suitable…

…termination, congenital absence or hypoplasia. Anomalous aortic origin of a coronary artery from the opposite sinus of Valsalva is associated with increased sudden death risk…

…a large change in TSH. During acute illness the TSH can be falsely low or high in the absence of thyroid disease; repeat it once…

…include: Older age. Female sex. Hypertension. Absence of an adequate collateral circulation. A first or anterior infarction. Single vessel disease without collateral support. Chronic kidney…

…and multiple organ failure. In the absence of treatment, approximately 1 in 100 cases of preeclampsia may progress to eclampsia. Clinical presentation and symptoms The…

…commercially available gene panels, which enables testing of over 100 genes. Absence of known mutations defines the condition as idiopathic dilated cardiomyopathy . Echocardiography in dilated…

…a storage form of glucose) which can be used to produce ATP in absence of oxygen. Unfortunately, glycogen yields only small amounts of ATP and…

…or second degree and third degree heart block in the absence of a pacemaker. Use of intravenous rhythm control antiarrhythmics (class I and class III…

…the other leads apply in the absence of left ventricular hypertrophy or left bundle branch block [8, 10]. Characteristics of ST Elevation in Acute Transmural…

…despite the absence of an angiographically obstructive lesion Coronary embolism or thrombus Epicardial coronary vasospasm Coronary microvascular dysfunction Spontaneous coronary artery dissection (SCAD) Standard angiography…

…non obstructive coronary anatomy. Such patients require a mechanism based assessment rather than reassurance based solely on the absence of obstructive CAD. Evaluation and Physical…

…The absence of urticaria must therefore not be used to exclude the diagnosis [1]. Isolated urticaria, localised angio oedema or itching without compromise of the…

…body reaching the stroma or deeper. The absence of a slit lamp — the cornea should not be instrumented without magnification. With a suspected chemical injury…

…Abrupt withdrawal of treatment with an ACE inhibitor may lead to clinical deterioration and should be avoided in the absence of life threatening complications (e…

…or cold exposure. The absence of chest pain does not exclude clinically important CCS. Silent or minimally symptomatic disease may occur in patients with diabetes…

…precisely, FFR compares the pressure driving flow distal to a stenosis with the pressure that would be available in the absence of that stenosis. The…

…presence of symptoms alone is insufficient. Anaemia and pulmonary, renal, thyroid or hepatic disease may produce a similar symptom complex; in the absence of cardiac…

…I, V5, and V6 (though a narrow Q wave may exist in aVL without myocardial pathology) [3] Absence of Q waves in I, V5, and…

…ischaemia. The absence of obstructive disease therefore does not establish a benign diagnosis. ANOCA/INOCA is associated with recurrent symptoms, impaired quality of life, repeated…

…or multifactorial mechanisms PAH is a distinct and uncommon form of precapillary PH. It is defined haemodynamically by precapillary PH in the absence of CTEPH…

…ECG tracing lasting ≥30 seconds, characterized by irregularly irregular R R intervals and the absence of distinct P waves [1] [2] . Stroke Risk Scores: CHA2DS2…

…the behavior of the pacemaker at low and high heart rate, the behavior of the pacemaker in the presence and absence of intrinsic cardiac activity…

…1. Pathological R wave progression is indicative of previous myocardial infarction. U wave changes New U waves (in absence of bradycardia) may indicate ischemia. If…

…third of patients. Its absence therefore does not exclude the diagnosis. Findings suggesting pericardial effusion A large effusion may cause: Diminished heart sounds Disappearance of…

…diagnosis. With a longer expected delay and a symptom duration of less than 12 hours, immediate fibrinolysis is recommended in the absence of contraindications, followed…

…risk categories. A significant shortcoming of the HCM Risk SCD Score is the absence of magnetic resonance imaging parameters (extent of myocardial fibrosis). Risk stratification…

…pulsatile, expansile mass, although absence of a palpable abnormality does not exclude AAA. Plain abdominal radiography has limited sensitivity. A calcified aneurysmal outline may be…

…stents. In acute ACS, aspirin should be administered as soon as possible in the absence of contraindications, using a loading dose followed by maintenance treatment…

…classical clinical triad consists of: Hypotension Jugular venous distension Muffled or absent heart sounds The triad suggests severe tamponade, but its absence does not exclude…

…Brief coronary occlusion or relatively prolonged moderate ischemia may produce post ischemic stunning. In the absence of infarction, contractile recovery can occur rapidly after reperfusion…

…or diffuse disease. No reflow represents impaired antegrade myocardial perfusion in the absence of a flow limiting epicardial stenosis. It is associated particularly with intervention…

…incidentaloma Hypertension associated with sleep apnoea Hypertension with atrial fibrillation in the absence of an underlying structural cardiac explanation Early onset hypertension or cerebrovascular accident…

…PCI of an occluded infarct related artery is not recommended when presentation is more than 48 hours after symptom onset in the absence of persistent…

…burden of AF does not reliably predict stroke risk. Infrequent episodes observed during office based assessments may coexist with asymptomatic episodes. Consequently, the absence of…

…ST segment elevation caused by spasm. The absence of obstructive disease generally indicates a more favourable course than VA accompanied by severe fixed lesions. Nevertheless…

…association between ECG changes and the risk of arrhythmia is weak. Hence, arrhythmias may occur in the absence of ECG changes and vice versa (i…

…appearance. The epidemiology of the early repolarization pattern The absence of a consensus definition of early repolarization has lead to variability in prevalence figures. Overall…

…ST T changes; the absence of such changes should lead to suspicion of ischemia (if the patient has symptoms consistent with ischemia). The same is…

…patients; their absence therefore does not exclude HFrEF. Clinical evaluation should define: The severity of symptoms and functional limitation. Evidence of congestion or fluid retention…

…leg raising with an increase in stroke volume 10%, or inferior vena cava variability . In the absence of responsiveness, fluid does more harm than good.

…severity of the symptoms governs the emergency treatment Severe symptoms The following symptoms indicate hyponatraemic encephalopathy and warrant immediate treatment in the absence of another…

…urgency. The presence or absence of haemodynamic instability or cardiogenic shock. The likelihood of an identifiable IRA. The extent and complexity of coexisting coronary disease…