相关实验视频

Updated: Feb 7, 2026

Genetic Variant Detection in the CALR gene using High Resolution Melting Analysis
08:46

Genetic Variant Detection in the CALR gene using High Resolution Melting Analysis

Published on: August 26, 2020

5.4K

心脏道的常见遗传变异改变了患者对1b类抗节律药物的反应

Martina Marras, Joshua D Josef, Thomas Schuster

    bioRxiv : the preprint server for biology
    |February 6, 2026
    PubMed
    概括

    在SCN5A基因中的S1103Y等遗传变异改变了对抗心律失常药物mexiletine的反应. 这种常见的多态性可以悖论地增加心律失常的风险,突出了个性化心律失常治疗的需要.

    更多相关视频

    Examining Monosynaptic Connections in Drosophila Using Tetrodotoxin Resistant Sodium Channels09:55

    Examining Monosynaptic Connections in Drosophila Using Tetrodotoxin Resistant Sodium Channels

    Published on: February 14, 2018

    10.3K
    Determining the Likelihood of Variant Pathogenicity Using Amino Acid-level Signal-to-Noise Analysis of Genetic Variation07:15

    Determining the Likelihood of Variant Pathogenicity Using Amino Acid-level Signal-to-Noise Analysis of Genetic Variation

    Published on: January 16, 2019

    11.4K

    相关概念视频

    Antiarrhythmic Drugs: Class I Agents as Sodium Channel Blockers01:22

    Antiarrhythmic Drugs: Class I Agents as Sodium Channel Blockers

    Class I antiarrhythmic drugs are used to treat various types of arrhythmias or irregular heart rhythms. These drugs block the sodium (Na+) channels in the cardiac cells, thereby affecting the movement of electrical impulses across the heart. Class I antiarrhythmic drugs are divided into three subgroups: Class IA, Class IB, and Class IC, each with distinct mechanisms of action and effects on the heart.
    Class 1A Antiarrhythmic Drugs: These drugs work by moderately blocking sodium channels,...
    3.3K
    Antiarrhythmic Drugs: Class III Agents as Potassium Channel Blockers01:12

    Antiarrhythmic Drugs: Class III Agents as Potassium Channel Blockers

    Class III antiarrhythmic drugs are a group of medications that can prolong action potentials in the heart. They achieve this by blocking potassium channels or enhancing inward currents from sodium channels. However, these drugs have a unique property of "reverse use-dependence," which is most pronounced at slower heart rates and can lead to torsades de pointes—a specific type of arrhythmia. However, it is essential to note that excessive QT interval prolongation—a measure of...
    2.2K
    Antiarrhythmic Drugs: Class IV Agents as Calcium Channel Blockers01:20

    Antiarrhythmic Drugs: Class IV Agents as Calcium Channel Blockers

    Class IV antiarrhythmic drugs, such as verapamil and diltiazem, block calcium channels. They primarily affect the heart, slowing the conduction in calcium-dependent tissues like the SA and AV nodes. These drugs manage reentrant supraventricular tachycardia (SVT) and reduce ventricular rate in atrial flutter/fibrillation.
    Verapamil, a calcium channel blocker, inhibits calcium movement across myocardial cell membranes and vascular smooth muscle. This results in the dilation of coronary and...
    1.9K
    Antiarrhythmic Drugs: Class II Agents as β-Adrenergic Blockers01:24

    Antiarrhythmic Drugs: Class II Agents as β-Adrenergic Blockers

    Adrenergic stimulation generally impacts cardiac rate and rhythm. Specifically, stimulation of the β-adrenoceptors triggers an increase in intracellular calcium ion influx and pacemaker currents, which may cause arrhythmias. Catecholamines like adrenaline also demonstrate β2-adrenoceptor-mediated hypokalemia, impacting cardiac action potential and disrupting the normal cardiac rhythm. Class II antiarrhythmic drugs are β-adrenoceptor antagonists or β-blockers, which...
    1.8K
    Antiepileptic Drugs: Sodium Channel Blockers01:08

    Antiepileptic Drugs: Sodium Channel Blockers

    Antiepileptic drugs are specialized medications that prevent seizures in individuals diagnosed with epilepsy. These drugs primarily function by blocking the movement of sodium ions through channels in the neuronal membrane, inhibiting the repetitive firing of action potentials often associated with seizures.
    Sodium channel blockers modulate ion channels, particularly voltage-gated sodium channels. They block only sodium ion movement.
    Among the most commonly prescribed antiepileptic drugs are...
    1.8K
    Common Ion Effect03:24

    Common Ion Effect

    Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Châtelier’s principle. Consider the dissolution of silver iodide:
    46.9K