…block Mobitz type I exhibits the Wenckebach phenomenon , which is characterized by a progressive delay in impulse conduction, eventually leading to a blocked atrial impulse…

…another. A low blood pressure may be due to low flow, low vascular tone or both, and the appropriate action differs fundamentally between these cases…

…MAP is often estimated using the formula: MAP ≈ Diastolic Blood Pressure (DBP) + 1/3 × (Systolic Blood Pressure [SBP] – DBP) This formula accounts for the longer…

…multiple arterial territories. The arterial wall is biologically active. Endothelial and smooth muscle cells normally regulate vascular tone, preserve an antithrombotic surface, and control the…

…via the autonomic nervous system. It attenuates carotid sinus baroreceptor activity and acts centrally and peripherally to enhance vagal tone. These sympatho inhibitory effects decrease…

…sinus rate. Its principal therapeutic distinction from beta blockers is that it lowers heart rate without directly reducing myocardial contractility or altering vascular tone. Accordingly…

…vivo in humans. Consequently, diagnosis depends on functional assessment. Coronary microvascular dysfunction (CMD) is characterized invasively by reduced CFR and increased microvascular resistance, measured by…

…rate increases during inspiration due to diminished vagal tone. And the opposite, i.e the heart rate decreases during expiration due to increased vagal tone…

…in the following circumstances: During sleep . Well trained individuals display SB at rest due to high vagal tone. These individuals have developed a highly efficient…

…and nervousness. This is due to altered tone in the autonomic nervous system, with increased sympathetic input (leading to stimulation of beta adrenergic receptors) and…

…treatment protocols that are available where you practise. Initial management of all poisonings ABCDE Step Assessment and action : : A Assess the airway, the pharyngeal reflexes…

…disorders (calcium, potassium), tachycardia, increased sympathetic tone, drug side effects etc. Secondary ST T changes occur when abnormal depolarization causes abnormal repolarization . This is se

…contexts [4]. Reduction of Sympathetic Drive Modulating autonomic tone is a pivotal therapeutic target [4]: Beta Blockers : Administered to reduce adrenergic stimulation [4]. Sedation and…

…confirm cardiac arrest. Skin color is pale or cyanotic, but this may be difficult to discern depending on the skin tone. For laypeople, confirming absent…

…degree of ischemia, parasympathetic and sympathetic tone) while others take months or years to develop (e.g. myocardial remodeling in heart failure or after myocardial…

…electrocardiogram (ECG) is interpreted using the same principles as in ECG interpretation in adults. The ECG must always be interpreted using a systematic approach in…

…Well trained athletes may have very high Vagal tone which lowers the automaticity in the sinoatrial node to the point where cells in the AV…

…angina at rest are not suitable candidates for perfusion imaging. Detecting ischemic regions requires provocation using pharmacologic agents or physical exercise. Pharmacologic agents include dipyridamole…

…Adam Stokes attack . Causes of sinoatrial arrest/pause High vagal tone is benign and the most common cause of sinus arrest/pause. It commonly affects…

…or measure at the toe instead. Marked pain that prevents the patient from tolerating compression. Preparation and equipment Equipment: a handheld Doppler probe 5–10…

…Severe pain Titrate the pressure up gradually Rheumatoid arthritis with vasculitis Individual assessment Repeat the ABI every three to six months during ongoing compression therapy…

…disease — a risk of osteomyelitis and poor healing. Check the ankle brachial index and the foot status before any procedure on a toe. Critical ischaemia…

…the pretreatment inadequate and the cardioversion must be postponed. Alternative when more rapid cardioversion is needed: transoesophageal echocardiography (TOE) excluding thrombus in the left atr

…the conjunctival sac before anything else is done. Preparation and equipment A visual acuity chart and a pinhole. A slit lamp with a cobalt blue…