Early Pregnancy Loss (Embryonic Demise) Imaging: Practice Essentials, Ultrasonography
Bradycardia. At 5-6 weeks GA, the mean embryonic heart rate is 101 beats per minute (bpm). This rate increases to 143 bpm by 8 ...
Sinus Bradycardia: Background, Pathophysiology, Etiology
Sinus bradycardia can be defined as a sinus rhythm with a resting heart rate of 60 beats per minute or less. However, few ... Causes of sinus bradycardia include the following:. * One of the most common pathologic causes of symptomatic sinus bradycardia ... The pathophysiology of sinus bradycardia is dependent on the underlying cause. [1] Commonly, sinus bradycardia is an incidental ... encoded search term (Sinus Bradycardia) and Sinus Bradycardia What to Read Next on Medscape ...
Cardiovascular Concerns in Spinal Cord Injury: Practice Essentials, Overview, Etiology
Reflex bradycardia and, less frequently, cardiac arrest have been noted in acute SCI. Bradycardia is often precipitated by ... Hypotension and bradycardia - As discussed previously, hypotension and bradycardia typically improve within days to weeks, and ... For bradycardia, atropine is the drug of choice, although it is rarely used in rehabilitation settings except during ... Bradycardia and cardiac arrest during tracheal suction--mechanisms in tetraplegic patients. Eur J Intensive Care Med. 1976. 2(4 ...
Myxedema Coma or Crisis: Practice Essentials, Pathophysiology, Epidemiology
Electrocardiography may reveal sinus bradycardia, low-amplitude QRS complexes, a prolonged QT interval, flattened or inverted T ... Cardiac contractility is impaired, leading to reduced stroke volume, low cardiac output, bradycardia and sometimes hypotension. ... Factors suggesting a poor prognosis are older age, persistent hypothermia, bradycardia, lower degree of consciousness by ... Electrocardiographic findings may include bradycardia, varying degrees of block, low voltage, nonspecific ST-segment changes, ...
Ciguatera Toxicity: Practice Essentials, Pathophysiology, Etiology
Bradycardia, hypotension, and T-wave abnormalities may occur in relation to the amount of ingested ciguatoxin. Cardiovascular ...
Hashimoto Thyroiditis: Practice Essentials, Background, Etiology
Hashimoto thyroiditis is part of the spectrum of autoimmune thyroid diseases (AITDs) and is characterized by the destruction of thyroid cells by various cell- and antibody-mediated immune processes. This condition is the most common cause of hypothyroidism in the United States in individuals older than 6 years.
Pediatric Hypoglycemia: Practice Essentials, Etiology, Epidemiology
Hypoglycemia may be considered a biochemical symptom, indicating the presence of an underlying cause. Because glucose is the fundamental energy currency of the cell, disorders that affect its availability or use can cause hypoglycemia.
Thyroid-Associated Orbitopathy: Overview, Pathophysiology, Etiology
Thyroid-associated orbitopathy (TAO), frequently termed Graves ophthalmopathy, is part of an autoimmune process that can affect the orbital and periorbital tissue, the thyroid gland, and, rarely, the pretibial skin or digits (thyroid acropachy). Although the use of the term thyroid ophthalmopathy is pervasive, the disease process is actually ...
Cluster Headache Clinical Presentation: History, Physical Examination
Cluster headache (CH), also known as histamine headache, is a primary neurovascular primary headache disorder, the pathophysiology and etiology of which are not well understood. As the name suggests, CH involves a grouping of headaches, usually over a period of several weeks.
Genetics of Glycogen-Storage Disease Type III: Background, Pathophysiology, Epidemiology
Glycogen-storage disease (GSD) type III (GSD III) is an autosomal recessive inborn error of metabolism caused by loss of function mutations of the glycogen debranching enzyme (Amylo-1,6-glucosidase [AGL]) gene, which is located at chromosome band 1p21.2.
Guillain-Barre Syndrome: Practice Essentials, Background, Pathophysiology
Guillain-Barré syndrome (GBS) can be described as a collection of clinical syndromes that manifests as an acute inflammatory polyradiculoneuropathy with resultant weakness and diminished reflexes. With poliomyelitis under control in developed countries, GBS is now the most important cause of acute flaccid paralysis.
Pediatric Hyponatremia Clinical Presentation: History, Physical Examination
Hyponatremia is defined as serum sodium (Na) concentration of less than 135 mEq/L. Plasma Na plays a significant role in plasma osmolality and tonicity (serum osmolarity = 2Na + Glu/18 + BUN/2.
Long QT Syndrome: Practice Essentials, Background, Etiopathophysiology
Bradycardia is a common feature in patients with LQTS. View Media Gallery ... although some patients may present with excessive bradycardia for their age, and some patients may have hearing loss ( ... Bradycardia is a common feature in patients with LQTS. ...
Viral Infections of the Mouth: Overview, Human Herpesvirus, Human Papillomavirus
Precautions - Hypotension; bradycardia; cardiac arrest; excitation; drowsiness; nervousness; dizziness; seizures; blurred ...
Hyperoxaluria: Practice Essentials, Oxalate Production and Function, Pathophysiology and Etiology
Patients experience burning of the mouth, pharynx, and esophagus; swallowing difficulties; diarrhea; bradycardia; cardiac ...
Ventricular Premature Complexes: Background, Pathophysiology, Etiology
Early afterdepolarizations commonly are responsible for bradycardia associated VPCs, but they also can be present with ischemia ...
Hypothyroidism: Practice Essentials, Background, Pathophysiology
Hypothyroidism is a common endocrine disorder resulting from deficiency of thyroid hormone. It usually is a primary process in which the thyroid gland is unable to produce sufficient amounts of thyroid hormone.
Hypercalcemia: Practice Essentials, Pathophysiology, Etiology
Bradycardia * Shortening of QT interval Calcium has a positive inotropic effect. Hypercalcemia also causes hypertension, ...
Etiology
Sinus bradycardia and AV conduction blocks are the most common ECG changes in the pediatric population, while ventricular ... Magnesium sulfate may terminate dysrhythmias, but is contraindicated in the setting of bradycardia or AV block and should be ...
Hyperparathyroidism: Practice Essentials, Anatomy and Embryology, Primary Hyperparathyroidism
Cardiovascular manifestations include hypertension, bradycardia, shortened QT interval, and left ventricular hypertrophy. [1] ...
Genetics of Glycogen-Storage Disease Type III Clinical Presentation: History, Physical, Causes
Bradycardia * Sudden death Older infants may manifest the following signs and symptoms in addition to those noted for neonates: ...
Torsade de Pointes: Overview, Pathophysiology, Etiology of Torsade
Beta-blockers should be avoided in those congenital cases in which bradycardia is a prominent feature. Beta-blockers are ... Pacemaker implantation is effective in cases that are associated with heart block or bradycardia. ICDs are indicated in cases ... Isoproterenol can be used in bradycardia-dependent torsade that usually is associated with acquired long QT syndrome (pause- ... Patients with acquired long QT syndrome usually develop torsade during periods of bradycardia. The most common causes of ...
Malignant Arrhythmia and Cardiac Arrest in the Operating Room: Practice Essentials, Problem, Management
Bradycardias, AV block. ECG presentations associated with poor outcome: AF, QT-interval prolongation, ST-segment and T-wave ... Bradycardias, AV block. ECG presentations associated with poor outcome: AF, QT-interval prolongation, ST-segment and T-wave ... 13] One prominent cause of bradycardia/asystole or various cardiac dysrhythmias is hyperkalemia. First-line treatment of acute ...
Periodic Paralyses: Background, Pathophysiology, Epidemiology
Bradycardia. Flat T waves, U waves, ST-segment depression. Tall T waves ...
Calcium Channel Blocker Toxicity: Practice Essentials, Background, Pathophysiology
Bradycardia * First-, second-, or third-degree atrioventricular (AV) block * Any type of bundle-branch block ...
Pediatric Hyponatremia: Practice Essentials, Background, Pathophysiology
Hyponatremia is defined as serum sodium (Na) concentration of less than 135 mEq/L. Plasma Na plays a significant role in plasma osmolality and tonicity (serum osmolarity = 2Na + Glu/18 + BUN/2.