…safe triangle (Figure 1). Outside it the risk of injuring the diaphragm, liver, spleen or internal thoracic artery increases. For diagnostic aspiration the point chosen…

ECG Myocardial ischemia and infarction Classification, diagnosis and definitions of acute coronary syndromes (ACS) and acute myocardial infarction (AMI) Acute coronary syndromes occur when atherosclerotic…

ECG Myocardial ischemia and infarction Use of ECG in acute coronary syndromes & chest pain patients An ECG must be performed on all patients seeking medical…

…instability or cardiogenic shock recurrent or ongoing chest pain refractory to medical treatment life threatening arrhythmias or cardiac arrest mechanical complications of acute myocardial infarction…

…leads. Localization of myocardial infarction / ischemia is done by using ECG changes to determine the affected area and subsequently the occluded coronary artery (culprit). Figure…

…hours after symptom onset or those are signs of old infarction. Pathological R waves also indicate previous myocardial infarction Current European (ESC) guidelines suggest that…

Continous medical discussion: the ECG blog Myocardial ischemia and infarction Myocardial ischemia The definition of ischemia may appear trivial but it is actually a very…

…MI using a biochemical and clinical approach. This culminated in the Universal Definition of Myocardial Infarction Consensus Documents, with the Fourth Universal Definition published in…

…Type 1 myocardial infarction Definition and pathophysiology Type 1 MI results from acute coronary atherothrombosis. It is usually precipitated by disruption of an atherosclerotic plaque…

…disease, ST segment elevation myocardial infarction, and cardiogenic shock. Patient related and procedural risk factors The risk of adverse events is increased by: advanced age…

…Haemodynamic instability or cardiogenic shock Life threatening arrhythmias or cardiac arrest after presentation Mechanical complications of myocardial infarction Recurrent dynamic ECG changes suggestive of ischaemia…

ECG Myocardial ischemia and infarction The ECG in the assessment of myocardial reperfusion The ECG is an invaluable tool to assess whether an occlusion has…

…and infarction Definition and clinical rationale Stable angina, or chronic chest pain attributable to suspected chronic coronary syndrome, is evaluated by estimating the likelihood of…

Cardiology Myocardial ischemia and infarction Definition and conceptual framework Acute coronary occlusion is the abrupt or progressive reduction of coronary blood flow sufficient to produce…

…reperfusion pathway. Important early clinical priorities include: Recognition of symptoms suggestive of myocardial infarction. Rapid acquisition and interpretation of a 12 lead ECG. Assessment for…

Cardiology Interpreting myocardial perfusion SPECT images involves a systematic comparison of rest and stress images to assess myocardial ischemia and infarction. The key steps in…

…as 2 weeks after infarction. Predisposing features Risk features vary by lesion but include: Older age. Female sex. Hypertension. Absence of an adequate collateral circulation…

…detect ST elevation myocardial infarction (STEMI). Stable patients with ROSC presenting with ST elevations should undergo urgent coronary angiography with the intent of performing PCI…

…the cell will die. Death of myocardial cells is referred to as myocardial infarction. Myocardial ischemia in clinical practice: coronary artery disease In clinical practice…

Critical care Myocardial ischemia and infarction Definition and Pathophysiology Cardiogenic shock is a state of inadequate tissue and end organ perfusion caused by cardiac insufficiency…

Myocardial ischemia and infarction ECG Definition and Pathophysiology Acute coronary syndromes (ACS) encompass a spectrum of clinical conditions characterized by a recent change in symptoms…

…the effusion develops in the early post infarction period. Clinical presentation and symptoms The characteristic clinical syndrome consists of: Malaise Fever Pericardial or chest discomfort…

…younger and more often female than patients with atherosclerotic mediated myocardial infarction. A history of cigarette smoking may be present despite relatively few other conventional…

…requires elevated levels of cardiac troponins. In addition to elevated troponins, the patient must display either symptoms or ECG changes consistent with myocardial infarction/ischemia…

…lead distribution [15]. Differential Diagnosis of ST Elevation Several nonischemic conditions can produce ST segment elevations that mimic acute myocardial infarction. Acute pericarditis is a…

…acute infarction, particularly when the clinical presentation is compatible with acute coronary syndrome. Recurrent or persistent symptoms should prompt repeat ECG acquisition and consideration of…

…ischemia and infarction Definition and Pathophysiology Type 2 myocardial infarction (MI) is defined as an ischaemic myocardial injury occurring in the context of a mismatch…

…ACS), including ST Elevation Myocardial Infarction (STEMI) [1] . Historically viewed as a simple plumbing problem characterized by the gradual accumulation of inert cholesterol debris, modern…

…Ongoing or newly recognized LV systolic dysfunction. A patient may also present because of complications of the underlying infarction or LV remodeling, including heart failure…

…It may be broken, as in Figure 1 . Any type of infarction may cause pathological R wave progression. However, the specificity for pathological R wave…

…been discussed previously (refer to ECG Changes in Acute Myocardial Infarction), a rehearsal is provided below. Management of acute STEMI is discussed in detail below…

…sided precordial leads when RVI is suspected in the setting of an inferior infarction. The presence of right sided ST segment elevation supports the diagnosis…

…acute myocardial infarction (AMI) is modified by several factors. The most important of these, and their implications, are as follows: The size of the thrombus…

…of myocardial infarction (necrosis) . However, unstable angina is considered an acute coronary syndrome because it is an imminent precursor to myocardial infarction. Approximately 50% of…

…as STEMI (ST Elevation Myocardial Infarction) in terms of treatment and interventions. As discussed previously, STEMI is the result of a complete and proximal occlusion…

…fascicular block and AV block, are common in myocardial ischemia and infarction. These conditions may be seen as signs of ischemia, which is why one…

…Secondary prevention after myocardial infarction (MI) encompasses long term interventions intended to reduce recurrent infarction, ischaemic stroke, cardiovascular death, and progression of atherosclerotic disease in…

…infarction ECG Posterior (posterolateral) acute myocardial infarction (STEMI) The heart is rotated 30° to the left in the thorax. This positions the basal portion of…

…that can trigger or sustain arrhythmias, such as necrotic tissue after myocardial infarction (refer to Mechanisms of cardiac arrhythmias). It is often difficult to clarify…

…instability. Fewer than 1% of patients with ST elevation myocardial infarction (STEMI) who reach the catheterization laboratory are found to have complete LMCA occlusion, likely…

…Myocardial Infarction (NSTEMI), and ST Elevation Myocardial Infarction (STEMI). Historically, guidelines bifurcated ACS into STEMI and NSTE ACS pathways. However, the 2023 European Society of…

…clinically significant infarction. Mechanisms of injury Procedural injury may result from acute compromise of coronary flow. Mechanisms include: Coronary dissection with obstruction of the true…

…occlusions. This is discussed in detail in the chapter NSTEMI (Non ST Elevation Myocardial Infarction). Orientation of myocardial fibers The orientation of myocardial fibers varies…

…to the coronary anatomy (refer to the chapter Coronary Arteries and Localization of Infarction & Ischemia). Figure 1 shows a detailed view of the coronary arteries…

…Thus, a patient may have acute myocardial injury without having an infarction. The degree of troponin elevation does not by itself establish the mechanism. Increased…

…in the setting of LBBB. A patient with acute STEMI may therefore display a normal LBBB pattern. LBBB may be caused by ischemia/infarction : There…

…After myocardial infarction, rehabilitation aims to: Restore and improve functional capacity Reduce disability and rehospitalization Improve quality of life and self efficacy Address modifiable cardiovascular…

…can be present [5]. Distinguishing Features: Pleuritic pain suggests pulmonary infarction, and a history of pain exacerbation with inspiration, along with a pleural friction rub…

…with an initial STEMI pattern has myocardial infarction as the final diagnosis. The underlying process usually involves acute thrombotic obstruction of an epicardial coronary artery…

…provided that other causes of right axis deviation have been excluded. Causes of left axis deviation Left bundle branch block. Left ventricular hypertrophy. Inferior infarction…

…provided that other causes of right axis deviation have been excluded. Causes of left axis deviation Left bundle branch block. Left ventricular hypertrophy. Inferior infarction…

…Myocardial necrosis (infarction) commences within 20 minutes of circulatory collapse. The electrical phase: Defibrillate It is likely that the majority of cardiac arrests are triggered…

…but not 6 month DAPT, was associated with higher rates of myocardial infarction or stent thrombosis in ACS patients. Extension beyond 12 months DAPT beyond…

Myocardial ischemia and infarction Definition and Pathophysiology Left main coronary artery disease (LMCAD) refers to atherosclerotic narrowing of the left main coronary artery, which supplies…

Myocardial ischemia and infarction Definition and Pathophysiology No reflow is impaired anterograde myocardial perfusion despite the absence of a flow limiting epicardial coronary stenosis. It…

…ischemia and infarction Pharmacology & dosing Definition and pathophysiology Atherosclerosis and acute coronary syndromes have important inflammatory components. Inflammation contributes to atherothrombosis through activation of innate…

…infarction (MI), antianginal drugs have not been shown to improve long term cardiovascular outcomes in CCS. General strategy For most patients, initial therapy consists of…

…and infarction Pharmacology & dosing Definition and pathophysiological rationale Dual antiplatelet therapy (DAPT) denotes treatment with aspirin plus a P2Y12 receptor inhibitor. In the setting of…

…and infarction Definition and Clinical Significance In stent restenosis (ISR) is recurrent narrowing within a previously implanted coronary stent. It represents a form of arterial…

…balance between: Anatomical completeness and complexity of revascularization Expected effects on death, myocardial infarction and stroke Likelihood of repeat revascularization Symptom burden and treatment goals…