…Regular physical activity is a central component of cardiovascular prevention and treatment. It is associated with lower cardiovascular and all cause mortality and with reduced…

…A1, A2B, and A3 receptors, which are associated with adverse effects such as bronchoconstriction and atrioventricular block. Adenosine is an agonist on A1, A2A, A2B…

…secondary prevention intervention for patients with cardiovascular disease, including those recovering from myocardial infarction. It extends beyond exercise training to incorporate individualized physical activity counselling…

Arrhythmias and arrhythmology Pharmacology & dosing Definition and Pathophysiology Sotalol is a nonselective beta adrenoceptor blocker devoid of intrinsic sympathomimetic activity that also prolongs cardiac repolarization…

…up with a meal or with continued glucose administration adapted to the cause. 8. Identify drugs, renal failure, alcohol, a missed meal, physical activity and…

…level, producing atrioventricular (AV) or intraventricular blocks. Isolated sinus bradycardia in the early hours following infarction may be associated with hemodynamic compromise. More broadly, bradyarrhythmic…

…per minute is defined as tachycardia , which is synonymous with tachyarrhythmia. Except for sinus tachycardia during physical activity, all tachycardias should be considered pathological and…

…s perceived exertion is a way of estimating the intensity of the physical activity. It is based on the subjective physical sensations experienced during exercise…

…to the assessment of exercise capacity. Metabolic equivalents (METs) can be used to estimate the energy cost of physical activity. One metabolic equivalent (1 MET…

…developing during physical activity; myocardial oxygen demand increases during physical activity, but an atherosclerotic plaque may prevent oxygen supply from increasing in parallel with oxygen…

…or diminished exercise tolerance. Whenever such symptoms are associated with ECG evidence of sinus node dysfunction, the condition is referred to as sick sinus syndrome…

…sinoatrial node is increased during physical activity, stress, and nervousness. This is due to altered tone in the autonomic nervous system, with increased sympathetic input …

…time due to the advent of more efficacious agents with wider therapeutic to toxic windows, and its routine use in adult patients is generally discouraged…

…pulseless electrical activity (PEA). Evaluation and Physical Examination The source material does not provide specific details regarding the physical examination maneuvers for patients with bradycardia…

…receptors, with variable effects on alpha receptors. Stimulation of beta receptors increases inotropy and chronotropy by elevating intracellular cyclic adenosine monophosphate (cAMP) and calcium, as…

…pressure, body mass index, cholesterol and glucose levels, together with a low salt, low cholesterol diet, regular physical activity, avoidance of smoking, and adequate sleep…

…muscle sensitivity to calcium by inhibiting myosin phosphatase activity. Patients with VA are generally younger than those with atherosclerotic non ST elevation acute coronary syndromes…

…Thus, increased sympathetic activity results in increased heart rate and stronger contractions. Physical exercise increases the venous return to the heart, which results in increased…

…severe episodes, with concurrent physical illness or after prolonged very high intake More than 90 percent of withdrawal seizures occur within 48 hours. Seizures later…

…integrated with management of precipitating factors such as anaemia, uncontrolled hypertension, thyrotoxicosis, tachyarrhythmia, uncontrolled heart failure, and concomitant valvular disease. Risk factor modification, physical activity…

…jaw, neck, or upper back. Chest discomfort triggered by emotional stress. Palpitations associated with physical activity, a large meal, emotional upset, or cold exposure. The…

…considered normal in highly trained athletes. Sinus rhythm should resume and bradycardia should resolve with the onset of physical activity. Profound sinus bradycardia (<30 beats…

…usually subside with cessation of activity, distinguishing it from angina pectoris. The location of the pain beneath the xiphoid and epigastrium, combined with patient denial…

…A sense of impending doom When STEMI begins during exertion, the symptoms generally do not resolve simply with cessation of activity, unlike typical exertional angina…

…condition. It is associated with a two to four fold increase in lifetime cardiovascular disease (CVD) risk and approximately doubles cardiovascular risk on average. Its…

…Palpitations, syncope or cardiac arrest–particularly during physical activity–in a young adult with T wave inversions in V1–V4, or other ECG changes (see…

…Whenever oxygen demand exceeds oxygen (blood) delivery ischemia occurs and this manifests with chest discomfort referred to as angina pectoris. If the physical activity ceases…

…most common arrhythmias encountered in clinical practice, beginning with a discussion of the underlying mechanisms of cardiac arrhythmias. While a detailed understanding of these mechanisms…

…when the valve area is reduced to 1.5 cm 2 . During physical activity, mitral stenosis may become symptomatic already at 2.5 cm 2…

…measured tracer activity over a wide range (Murthy et al.). As evident in Figure 1, 15 O water is the only tracer with myocardial uptake…

…48 hours Smoking 1 hour Vigorous physical exertion 30 minutes A large meal 2 hours Withholding applies only to diagnostic spirometry with a reversibility test…

…Physical inability to perform the test safely. Relative: Condition Comment : : Left main stenosis Known — perform the test only on a clear indication and with full…

…finding in acute coronary syndromes). Between 3 8 minutes, pulseless electrical activity (PEA) develops. PEA progresses to asystole within minutes, as outlined in the studies…

…syringe with a soft catheter and body temperature water for irrigation. Small children need help to keep still. Sedation is usually better than physical restraint…

…to alteplase with respect to an excellent functional outcome, without an increased risk of symptomatic intracerebral haemorrhage or death [3]. Acute overview 1. Activate the…

…ventricular fibrillation, in any situation. ECG features of ventricular fibrillation The ECG shows irregular waves with varying morphology and amplitude. No P wave, QRS complex…

…Lathundar Definition and aims of treatment Convulsive status epilepticus in adults is present with: an ongoing generalised tonic clonic seizure lasting at least 5 minutes…

…patient has a confirmed diagnosis of pheochromocytoma Treatment of hypertension associated with pheochromocytoma; treatment of dermal necrosis after extravasation of drugs with á adrenergic effects…

…AF) in clinical practice. Both arrhythmias are associated with similar clinical settings and frequently coexist in the same patient population. AF can act as a…

…activity therefore contributes to higher LDL C concentrations. The genetic evidence provides the rationale for therapeutic inhibition. Gain of function PCSK9 mutations are associated with…

…VF) and pulseless ventricular tachycardia (VT). The bradyarrhythmias include all bradyarrhythmias, pulse less electrical activity (PEA), and asystole. Bradyarrhythmias are discussed in the chapter Management…

…and drug induced reactions. Approximately 90% of anaphylactic cardiac arrests present with pulseless electrical activity (PEA) as the initial rhythm, while the remainder manifest ventricular…

…considered. Catheter ablation should be considered in patients with a high risk of recurrence. Electrical cardioversion is generally ineffective in the treatment of atrial tachycardia…

…spontaneous cardiac rhythm. The likelihood of achieving spontaneous cardiac activity is a function of the duration of circulatory standstill and the underlying cause, as elaborated…

…electrical currents. An ECG lead is a graphical description of the electrical activity of the heart and it is created by analyzing several electrodes. In…

…atrium. An electrode placed in the oesophagus at the right level therefore records atrial depolarisation with an amplitude the surface ECG can never achieve, and…

…while awaiting the antidote and specific treatment. Bradyasystole during and after cardiac arrest with persisting electrical activity. Overdrive pacing in bradycardia dependent torsades de pointes…

…The hypotensive effect of enalaprilat depends on plasma volume and plasma renin activity. Volume depletion and high plasma renin activity increase the effect of enalaprilat…

…vascular lesions. The interleukin 1β pathway, with downstream effects involving interleukin 6 and C reactive protein, has been a major therapeutic target. This concept…

…heart failure, atrial fibrillation and peripheral artery disease. Prognosis is generally worse when diabetes coexists with these conditions. However, the cardiovascular effects of SGLT2 inhibitors…

…Hypothyroidism Vitamin D deficiency Concomitant interacting medications The SLCO1B1 rs4149056 polymorphism is associated with higher statin concentrations and may increase the risk of simvastatin related…

…rate, the behavior of the pacemaker in the presence and absence of intrinsic cardiac activity, Modern pacemakers are packed with algorithms that optimize the function…

…it is exhaled. The final partial pressure of carbon dioxide in exhaled air represents the sum of ventilation, metabolic activity, and perfusion. Increased aerobic metabolism…

…hypotension. The high mortality associated with sepsis underscores the critical importance of timely and appropriate interventions. In patients presenting with concurrent sepsis and cardiac arrest…

…small to be detected by skin electrodes; the ECG presents the electrical activity of the atrial and ventricular myocardium. Automaticity of pacemaker cells The automaticity…

…sensing (analyzing electrical activity in the heart) and store electrocardiograms. The pacemaker is powered by a lithium battery with a lifespan of 5–10 years…

Drugs and electrolyte imbalance ECG Digoxin ECG changes: arrhythmias, conduction defects and waveform changes Digoxin may be used in patients with heart failure, atrial fibrillation…

…partial scarring. Severe defects : Defined by absent tracer uptake, with signal intensity comparable to background activity, typically representing infarcted tissue or non viable myocardium. Perfusion…

…normal findings, normal variants, etc – from adult electrocardiograms. It is crucial to be familiar with normal findings, normal variants, and pathology in neonates, infants and…

…However, most clinicians who encounter patients with pacemakers only have access to conventional surface ECGs. Being able to assess pacemaker function and perform troubleshooting should…