Heart of the Matter
What is the ability to generate action potential or electrical impulses without being excited by an external stimuli
Automaticity
Pacermaker of the heart
AV Node
Faster-than-normal heart rate—usually anything faster than 100 beats/min in an adult
Sinus Tachycardia
Resistance against which the heart has to beat: The higher the resistance in the system, the harder the heart will have to contract to force open the valves and pump the blood along.
Afterload
Serious complication from using Lisinopril
Angioedema
The heart can conduct an impulse rapidly through the system so that the muscle cells of the heart are stimulated at the same time
Conductivity
Reflects the critical timing of depolarization and repolarization of the ventricles
Q-T Interval
Slower-than-normal heart rate (usually less than 60 beats/min)
Sinus Bradycardia
Hypertension with no known cause
Essential hypertension
Unrelenting nonproductive cough is caused by this class of medication
ACE inhibitors
Stimulates the heart to beat faster, speeds conduction through the AV node, and causes the heart muscle to contract harder.
Sympathetic nervous system
Reflects the normal delay of conduction at the AV node
P-R Interval
Slowing or lack of conduction at the AV node
Atrioventricular Block
Factors that are known to increase BP in some people.
stress, a high-salt diet, lack of rest, and genetic predisposition.
Renin Inhibitor can cause
Hyperkalemia
This system slows the heart rate and decreases the speed of conduction through the AV node.
Parasympathetic nerves
Reflects important information about the repolarization of the ventricles.
S-T Segment
The amount of blood that is pumped out of the ventricle with each heartbeat
Stroke volume
Low blood pressure
Hypotension
Avoid drinking this juice with calcium channel blockers
Grapefruit juice
Influences the heart rate, rhythm and strength of contraction.
Autonomic nervous system
What is the range for a normal heart rate
60-100 beats
Causes of Sinus Tachycardia
Exercise, fear, or stress.
Class hypertensive medications that are not effective in African Americans
Less responsive to ACE inhibitors, ARBs, renin inhibitors, and beta-blockers.
Patients with asthma should avoid this class of medication
Beta Blockers