Term
|
Definition
| IA- block Na/K channels. Increases QRS and QT interval. Wide spectrum, good for supraventricular and ventricular arrhythmias. |
|
|
Term
|
Definition
| Blocks Na channels. Decreases conduction. No effect on normal heart tissue, good for digoxin induced arrhythmias. |
|
|
Term
|
Definition
| Blocks Na channels, big decrease in conduction. Increases QRS complex. Good for serious ventricular arrhythmias. |
|
|
Term
|
Definition
| Increases PR interval. Good for SNS arrhythmias. Beta-blockers. |
|
|
Term
|
Definition
| Blocks K channels, increases QT and decreases PR interval. Increases refractoriness. Good for a wide range of arrhythmias, less likely to cause arrhythmias. Good for arrhythmias associated with cardiac resuscitation. |
|
|
Term
|
Definition
| Ca channel blockers (verapamil, diltiazem), increase PR interval, decrease conduction, good for ventricular rate control in A flutter or A fib. |
|
|
Term
|
Definition
| Blocks Na/K-ATPase, increases contractility, decreases SNS and increases PNS. Can cause arrhythmias via ectopic pacemakers |
|
|
Term
|
Definition
| Increases K channel opening, decreases intracellular cAMP levels. Increases PR interval, for AV nodal re-entry tachycardia. Short duration, given IV. |
|
|
