Myocardial ischemia and infarction Definition and pathophysiology In acute coronary syndrome (ACS) with multivessel coronary artery disease (MVD), revascularization may be directed exclusively at the…

Echocardiography The standard transthoracic echocardiographic examination This chapter presents a sequential series of images that comprise a complete standard echocardiographic examination. The image views are…

…course at ecgwaves.com. This website provides a comprehensive learning ecosystem. It includes a complete ECG book, enriched with over 600 pages, engaging video lectures…

Info The ECG shows AV block III (complete heart block). P waves are not related to QRS. PP interval is constant, but independent of RR…

…degree AV block. ECG examples are given in Figure 1 . Figure 1. Third degree AV block (complete heart block, AV dissociation). Figure 2. Example of…

Cardiology Clinical medicine Definition and cardiovascular rationale Smoking cessation is the complete discontinuation of tobacco smoking, with avoidance of second hand smoke and, where possible…

…Definition and pathophysiology A chronic total occlusion (CTO) is a complete or nearly complete coronary arterial obstruction that has persisted for at least 30 days…

…Study Figure 7 carefully, as it illustrates how the P wave and QRS complex are generated by the electrical vectors. Note that the first vector…

…the plasma glucose, a blood gas and an ECG all come before complete identification of the substance. Treatment of acute poisoning consists of four parallel…

…Sepsis is a dynamic condition. Investigation and treatment must therefore proceed in parallel and must not wait for complete diagnostic certainty. Sepsis is defined as…

…necessary ECG skills required for clinical work. You must complete the ECG course in order to obtain your certificate. New ECG test will be added…

…acute coronary syndromes that exhibit significant ST segment elevations on ECG are classified as STE ACS. Moreover, STE ACS is caused by a complete coronary…

…interventions. As discussed previously, STEMI is the result of a complete and proximal occlusion in a coronary artery, which results in transmural myocardial ischemia. The…

…is the first line treatment and must be given early when anaphylaxis is suspected. Do not wait for a complete diagnosis or for grading. Antihistamines…

…any decision to limit treatment when time allows. There is complete upper airway obstruction where laryngoscopy will not succeed; plan for a surgical airway or…

…must be corrected in a controlled fashion, since too rapid a rise can cause osmotic demyelination syndrome [1,2]. Hyponatraemia is primarily a disorder of…

…distended neck veins, muffled heart sounds Beck's triad; complete in a minority Tachycardia, tachypnoea, cold periphery Almost always Pulsus paradoxus above 10 mmHg A…

…atropine: Complete heart block (third degree AV block) and second degree AV block Mobitz type 2. Marked sinus bradycardia, sinus arrest, sick sinus syndrome with…

…The complete physiological formulation considers coronary venous pressure: Distal coronary driving pressure: distal coronary pressure minus coronary venous pressure Normal coronary driving pressure: mean aortic…

…recovery patterns within the left ventricle, resulting in a widened QRS complex and secondary ST T wave abnormalities [7]. Diagnostic Criteria The diagnostic requirements for…

…reducing the dose or stopping therapy. It is divided clinically into: Complete intolerance: inability to tolerate any dose of any statin. Partial intolerance: inability to…

…obstructive pulmonary disease (COPD) Bronchospasm (asthma) Other : Coma Central hypoventilation syndromes Neuromuscular diseases Anemia The natural course of asphyxia Should ventilation be entirely inhibited (as…

…venous and arterial pressures are substantially reduced, potentially leading to complete obstruction of venous return by the uterus. This can be remedied by manual displacement…

ECG Left main coronary artery occlusion Left main coronary artery (LMCA) occlusion is a rare but catastrophic manifestation of acute coronary syndromes. The LMCA supplies…

…due to the low concentration of gap junctions in AV nodal cells), which allows for ventricular filling to complete prior to ventricular contraction. In contrast…

…ischemia present in STEMI. In STEMI, a complete coronary artery occlusion leads to transmural ischemia, affecting a larger portion of the myocardium, thereby intensifying chest…

…of ST segment elevations. If the reperfusion is complete (after a total occlusion) the ST segment is normalized within one hour, and this confirms that…

…attack Life threatening attack : : : : Speech Full sentences Cannot complete a sentence in one breath Single words or unable to speak Position and behaviour Can lie…

…symptom onset or the time last known to be well NIHSS A complete score by a physician or nurse experienced in stroke Functional impact A…

…moment the spray starts. Let the tissue thaw completely between cycles — it is the freeze–thaw–freeze cycle that causes cell death, not the cold…

…Working suction, oxygen and complete equipment for intubation and ventilation must be to hand before the lavage begins. The head of the trolley must be…

…no urethral catheter may be passed. An attempt can convert a partial rupture into a complete one. Contact the urologist or the surgeon on call…

…prosthesis — warfarin is mandatory, and direct oral anticoagulants (DOACs) are contraindicated. Antiphospholipid syndrome, particularly triple positive disease or after an arterial event, where DOACs have…

…burden should be reported using the Agatston score. A complete report should ideally include: Total Agatston score Calcium score in each coronary vessel Age , sex …

…is variable. Patients may have: Stable angina or an anginal equivalent Exertional dyspnoea or reduced exercise tolerance Acute coronary syndrome Silent ischaemia Heart failure, particularly…

…stenoses. Higher scores indicate more diffuse or technically complex disease and are associated with a greater relative advantage for CABG over PCI in multivessel disease…

…Progressive heart failure. Cardiogenic shock. Complete transection of a papillary muscle may cause immediately overwhelming MR. Partial rupture, often involving the tip or head of…

…ischemia Cardiomyopathy Bradycardia Hypothyroidism Hypothermia A separate chapter discusses Long QT syndrome (LQTS). A complete list of drugs causing QT prolongation can be found here…

…thorough questioning of eyewitnesses, and a complete physical and neurologic examination. Blood pressure and heart rate should be measured in the supine position and after…

…is generally considered less effective than thoracotomy. This is because it does not ensure complete drainage of the pericardium, and needles or catheters are at…

…STE ACS (ST Elevation Acute Coronary Syndrome) : STE ACS occurs when plaque rupture, and the ensuing atherothrombosis, causes a complete occlusion of the coronary artery…

…occluding smaller vessels downstream). The thrombosis causes occlusion of the artery; blood flow may be partially or completely obstructed. Consequently, the myocardium supplied by the…

…the T wave in lead aVL will be inverted and in some cases lead I will display a monophasic R wave instead of qR complex…

…seconds. Importantly, all P waves are followed by QRS complexes. First degree AV block is rarely of clinical significance and typically does not require intervention…

…uncertain relation to symptoms Tachyarrhythmias with uncontrolled ventricular rates Acquired advanced or complete heart block Hypertrophic obstructive cardiomyopathy with severe resting gradient Recent stroke or…

…retrograde P wave will be visible in leads II, III and aVF prior to the QRS complex. If the ventricles are activated prior to the…

…fibrinolysis (Wilner et al.). Their findings revealed that a substantial number of these patients had complete coronary artery occlusions, and outcomes improved when they were…

…QRS duration. A QRS duration of 120 ms (0.12 s) or more is required to diagnose a complete left bundle branch block . In addition…

ECG Myocardial ischemia and infarction Non ST Elevation Acute Coronary Syndromes (NSTE ACS): Non ST Elevation Myocardial Infarction (NSTEMI) and Unstable Angina (UA) The focus…

…cardiac death and ventricular arrhythmias. Figure 2. Fragmented QRS complex. These QRS configurations are also indicate of previous myocardial infarction. New conduction defect Myocardial infarction…

…to acquire images in the left lateral decubitus position. This affects images obtained in apical windows (refer to Standard Transthoracic Echocardiogram: Complete Imaging Protocol). Nevertheless…

…the ventricles it will spread partly or entirely outside of the conduction system and thus produce a wide QRS complex (QRS duration ≥0.12 s)…

…atrial impulses to conduct to the ventricles, resulting in some P waves not being followed by QRS complexes. This condition is further categorized into two…

…STE ACS (ST Elevation Acute Coronary Syndrome) : STE ACS occurs when plaque rupture, and the ensuing atherothrombosis, causes a complete occlusion of the coronary artery…

…large amounts of ATP (Page et al). The mitochondrial density allows for complete replenishment of ATP within 10 seconds (Fell et al, Houtkooper et al)…

…ms). Increasing the number of ultrasound lines or image depth will reduce the frame rate since more time is required to complete each frame. Thus…

…entirely outside of the ventricular conduction system, and thus the ventricular depolarization is slow (yielding a wide QRS complex). Because the ventricular depolarization is abnormal…

…10 minutes. A maximum of two infusions can be given. Each infusion should be completed, even if the patient reverts to sinus rhythm. Th e…

…and is not specific: motor neurone disease, myopathies and Lambert–Eaton syndrome may also give a positive result. A negative test does not exclude myasthenia…

…a finding that can wait until the next day. Moisture completes a circuit across the mucosa, hydroxide ions are generated at the negative pole of…