54 träffar

ArticleEchocardiography
Physics of ultrasound

…will transfer the mechanical (pressure) energy to the new medium, which may also start to vibrate (Figure 1). Figure 1. The principle of how sound…

ArticleCardiology
The ischemic cascade

…this sequence, before mechanical dysfunction ( i.e. left ventricular systolic or diastolic dysfunction) or electrical changes (ST T changes on ECG) become apparent. In contrast…

ArticleProcedurer
Arterial line

…cardiac arrest. Repeated blood gases, for example during mechanical ventilation or severe metabolic derangement. Major surgery with expected blood loss or large volume shifts. Patients…

ArticleProcedurer
Edrophonium test

…EMG about 95 %). Contraindications Known hypersensitivity to edrophonium. Mechanical obstruction of the bowel or the urinary tract. Marked bradycardia, sick sinus syndrome or high grade…

ArticleProcedurer
Warfarin therapy

…Warfarin has a narrow therapeutic index, a half life of several days and more than a hundred clinically relevant interactions. What determines whether the treatment…

ArticleMyocardial ischemia and infarction
NSTEMI: Risk Stratification and Timing of the Invasive Strategy

…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…

ArticleEmergency medicine
STEMI: Primary PCI and System-of-Care Time Targets

…Mechanical or pump failure complications , including heart failure and cardiogenic shock. Most out of hospital deaths occur early and are commonly related to ventricular fibrillation…

ArticleEchocardiography
Artifacts in ultrasound imaging

…g skeleton, calcifications, mechanical heart valves) and reflect virtually all sound waves, leaving too few waves to explore the area behind the reflector. This results…

ArticleCPR
The chain of survival in sudden cardiac arrest

…endotracheal intubation, mechanical chest compressions, targeted temperature management, etc.) and are much less effective in terms of the number needed to treat (NNT). The Number…

ArticleEchocardiography
The ultrasound transducer

…ultrasound waves, they begin to vibrate and these mechanical vibrations are converted into electric current that is sent back to the ultrasound machine, where the…

ArticleEchocardiography
Tricuspid stenosis

…replacement can be performed with biological or mechanical prostheses. The former is preferred due to the lower risk of thrombosis and evidence demonstrating long term…

ArticleProcedurer
Electrical cardioversion

…the R wave The shock is delivered immediately Why Avoids the vulnerable phase of the T wave There is no R wave to synchronise to…

ArticleReferensvärden
Intensive care parameters

…heparin unless contraindicated Head of the bed 30–45° Stress ulcer prophylaxis During mechanical ventilation, in coagulopathy, or with a history of gastrointestinal bleeding Refeeding…

ArticleProcedurer
Pleural aspiration and chest drain

…Relative Skin infection, herpes zoster or burns over the puncture site Relative Mechanical ventilation with a high PEEP (an increased risk of pneumothorax; ultrasound guidance…

ArticleProcedurer
Transcutaneous and transvenous pacing

…preferably anteroposteriorly : one anteriorly over the praecordium to the left of the sternum, the other on the back between the left scapula and the spine…

ArticleCardiology
Diuretic Strategy and Decongestion in Heart Failure

…the full range of left ventricular ejection fraction and may result from systolic dysfunction, diastolic dysfunction, or both. The clinical consequences of extracellular volume expansion…

ArticleMyocardial ischemia and infarction
In-Stent Restenosis: Mechanisms and Treatment

…Incomplete lesion preparation Persistent stenosis within the treated segment Mechanical factors are particularly important because correction of the underlying problem is necessary for durable treatment…

ArticleEchocardiography
Left Ventricular Thrombus After Myocardial Infarction

Echocardiography Myocardial ischemia and infarction Definition and pathophysiology Left ventricular (LV) thrombus is an intracavitary clot attached to the LV endocardium, typically overlying an akinetic…

ArticleMyocardial ischemia and infarction
Stent Thrombosis: Timing, Causes, Diagnosis, and Prevention

…small vessels, multivessel disease, bifurcation lesions, treatment of acute myocardial infarction Procedural and mechanical Stent underexpansion, incomplete wall apposition, residual inflow or outflow disease, edge…

ArticleCPR
Epidemiological aspects of cardiac arrest

…explain the marked differences in characteristics and outcomes across the data sources for out of hospital cardiac arrest (OHCA) and in hospital cardiac arrest (IHCA…

ArticleCardiology
Levosimendan (Simdax, Simendan) in acute heart failure

…resuscitated cardiac arrest, cardiac transplantation or mechanical circulatory support, nonfatal myocardial infarction, transient ischemic attack or stroke, and initiation of renal replacement therapy. The study…

ArticleConduction defects
Overview of atrioventricular (AV) blocks

…the ventricles. First degree AV block is rarely serious and may be left untreated in the vast majority of cases (exceptions are discussed later). Second…

ArticleCPR
Traumatic cardiac arrest

…cordis occurs as a result of a blunt, non penetrating blow to the chest, typically over the precordium. The mechanical impact can induce ventricular fibrillation…

ArticleEchocardiography
Left Ventricular Function

…myocardial mechanics, with emphasis on echocardiographic aspects. The bulk of the discussion concerns left ventricular function, which has been studied intensely over several decades. Left…

ArticleEchocardiography
Left ventricular diastolic function

…and echocardiographic assessment The importance of systolic function can be understood on an intuitive basis. Consider the fact that the left ventricle contracts and ejects…

ArticleEchocardiography
Aortic regurgitation

…aortic regurgitation gradually leads to impaired contractile function and the development of myocardial fibrosis. Contractile dysfunction further aggravates the regurgitation (the regurgitation volume increases). Mechanically…