Drugs-Acting-on-the-Cardiovascular-System (midterms) Flashcards
It work by altering the normal reflexes that control blood pressure. It does not cure the
disease but is aimed at maintaining the blood
pressure within normal limits to prevent the damage that hypertension can cause.
Antihypertensive
drugs
ANGIOTENSIN-CONVERTING-ENZYME (ACE) INHIBITORS also used in conjunction with digoxin the treatment of ____ and _______
- heart failure
- left ventricular
dysfunction.
act in the lungs to prevent ACE from converting angiotensin I to angiotensin II, a powerful vasoconstrictor and stimulator
of aldosterone release. This action leads to a decrease in BP an in aldosterone secretion, with a resultant slight increase in serum potassium and a loss of serum sodium and fluid.
ANGIOTENSIN-CONVERTING-ENZYME (ACE) INHIBITORS
ANGIOTENSIN-CONVERTING-ENZYME (ACE) INHIBITORS act in the lungs to prevent ACE from converting angiotensin I to ________
angiotensin II
it inhibit the movement of calcium ions across the membranes of myocardial and arterial muscle cells, altering the action potential and blocking muscle cell contraction.
Calcium-channel blockers
They are also used in conjunction with digoxin
the treatment of heart failure and left ventricular
dysfunction. They are also approved for the treatment of diabetic and diuretics for
nephropathy
ANGIOTENSIN-CONVERTING-ENZYME (ACE) INHIBITORS
a powerful vasoconstrictor and stimulator of aldosterone release.
angiotensin II
selectively bind with the angiotensin II receptors in vascular smooth muscle and in the adrenal cortex to block vasoconstriction and the release of aldosterone. These actions block the BP-raising effects of the renin-angiotensin system and lower BP.
Angiotensin II receptor blockers - ARBs
______ also has the advantage of parenteral use (enalaprilat [Vasotec IV]) if oral use is not feasible or rapid onset is desirable.
Enalapril
These drugs are indicated to be used alone or in combination therapy for the treatment of hypertension and for the treatment of heart failure in
patients who are intolerant to ACE inhibitors. They also slow the progression of renal disease in patients with hypertension and type 2 diabetes.
Angiotensin II receptor blockers - ARBs
All of the ACE inhibitors are administered ______.
orally
The effect of Calcium-channel blockers depresses _____, _________, and _____ causing a fall in BP and a decrease in venous
return.
- myocardial contractility
- slows cardiac impulse formation in the conductive tissues
- relaxes and dilates arteries,
These drugs are indicated for the treatment of severe hypertension that has
not responded to other therapy
Vasodilators
______ can produce additive hypotensive effects when given with adrenergic or other anti-hypertensive drugs.
Hydralazine
Angiotensin II receptor blockers - ARBs agents are all given orally. They are well
absorbed and undergo metabolism in the liver by
the ___________.
cytochrome P450 system
A potentially serious effect of the calcium-channel blockers to note is an increase in serum levels and toxicity of cyclosporine if
taken with ______.
diltiazem
act directly on vascular smooth muscle to cause muscle
relaxation, leading to vasodilation and drop in BP.
Vasodilators
_____ are also sometimes
used in the treatment of Raynaud’s disease and migraine headache.
Calcium-channel blockers
_______ must be used with extreme caution in
patients with functional hypoglycemia - because this
drug increases blood glucose levels by blocking insulin
release.
Diazoxide
Diazoxide must be used with extreme caution in
patients with ______ - because this drug increases blood glucose levels by blocking insulin release.
functional hypoglycemia
drug that blocks ACE, the
enzyme responsible for converting angiotensin I to angiotensin II in the lungs; this
blocking prevents the vasoconstriction and aldosterone release related to
angiotensin II.
Angiotensin-converting enzyme (ACE) inhibitor
specific receptors found in blood vessels and in the adrenal gland that react with angiotensin II to cause
vasoconstriction and release of aldosterone.
angiotensin II receptors
______ are drugs used to increase the contractility of the heart muscle for patients
experiencing heart failure.
Cardiotonic agents
a common, often asymptomatic disorder in which systolic blood
pressure persistently exceeds 140 mm Hg and/or diastolic pressure exceeds 90
mm Hg
Hypertension
sustained blood pressure that is lower than that required to
adequately perfuse all of the body’s tissues.
Hypotension
sustained blood pressure above normal limits with no
discernible underlying cause
Essential hypertension
force that resists the flow of blood through the vessels,
mostly determined by the arterioles, which contract to increase resistance;
important in determining overall blood pressure
Peripheral resistance
The _______ were originally derived from the foxglove or digitalis plant. These plants were once ground up to make digitalis leaf
cardiac glycosides
The cardiac glycosides were originally derived from
the _______. These plants were once ground up to make digitalis leaf
foxglove or digitalis plant
is a cardiac glycoside used for the treatment of heart failure and certain kinds of heart
arrhythmia. It is a phytosteroid and is similar in structure and effects to digoxin.
Digitoxin
it has a brand name called Lanoxin. Most frequently it is used for atrial fibrillation, atrial flutter, and heart failure. It is one of the oldest medications used in the field of cardiology
Digoxin-
is indicated for treating heart
failure and irregular heartbeats.
cardiac glycoside
Cardiac glycosides are contraindicated in the presence of allergy to any
component of the ______
digitalis preparation.
There is a risk of increased therapeutic effects and toxic effects of cardiac glycosides if it is taken with:
verapamil
amiodarone,
quinidine
quinine,
erythromycin,
tetracycline, or
cyclosporine
Cardiac glycosides drugs may be less effective if it is combined with:
thyroid hormones, metoclopramide, or penicillamine.
Absorption of oral cardiac glycosides may be decreased if it is taken with:
cholestyramine, charcoal, colestipol, antacids,
bleomycin, cyclophosphamide, or methotrexate.
cardiac glycoside has a rapid onset of action and rapid absorption, _____ minutes when taken orally and __minutes
when given intravenously
orally: 30-120 minutes
intravenously: 5 to 30 minutes
_____ belong to a second class
of drugs that act as cardiotonic (inotropic) agents. These
include inamrinone (Inocor) and milrinone (Primacor).
phosphodiesterase inhibitors
phosphodiesterase inhibitors are approved only for use in patients with _____ who does not have been responsive to digoxin, diuretics, or
vasodilators.
HF
enlargement of the heart, commonly seen with chronic
hypertension, valvular disease, and heart failure
Cardiomegaly
second class of drugs that act as cardiotonic (_____) agents
inotropic
a disease of the heart muscle that leads to an enlarged heart
and eventually to complete heart muscle failure and death
Cardiomyopathy
blood-tinged sputum, seen in left-sided heart failure when blood backs up into the lungs and fluid leaks out into the lung tissue
Hemoptysis
getting up to void at night, reflecting increased renal perfusion with fluid shifts in the supine position when person has gravity-dependent edema related to heart failure; other medical conditions, including urinary tract infection, increase
the need to get up and void
Nocturia
discomfort with respirations, often with a feeling of anxiety and inability to breathe, seen with left-sided heart failure.
Dyspnea
difficulty breathing when lying down, often referred to by the
number of pillows required to allow a person to breath comfortably
Orthopnea
are fast sodium channel blockers.
CLASS I Antiarrhythmics
effect resulting in an increased force of contraction
Positive inotropic
a condition in which the heart muscle fails to adequately pump blood around the cardiovascular system, leading to a backup or congestion of
blood in the system
Heart failure (HF)
rapid and shallow respirations, seen with left sided heart failure
Tachypnea
severe left-sided heart failure with backup of blood into the
lungs, leading to loss of fluid into the lung tissue
Pulmonary edema
Antiarrhythmic agents, also known as cardiac dysrhythmia medications, are a
group of pharmaceuticals that are used to suppress abnormal rhythms of the heart (cardiac arrhythmias), such as:
- atrial flutter
- ventricular tachycardia
- ventricular fibrillation
______ also known as cardiac dysrhythmia medications, are a
group of pharmaceuticals that are used to suppress abnormal rhythms of the heart (cardiac arrhythmias), such as atrial
fibrillation, atrial flutter, ventricular tachycardia, and ventricular fibrillation.
Antiarrhythmic agents,
These drugs preferable in conditions such as tachycardia,
in which the sodium gates are open frequently
CLASS I ANTIARRHYTHMICS
Also for the treatment of potentially life-threatening
ventricular arrhythmias and should not be used to treat
other arrhythmias because of the risk of a proarrhythmic
effect.
CLASS I ANTIARRHYTHMICS
are conventional beta blockers
CLASS II ANTIARRHYTHMICS
The _______ competitively block
beta-receptor sites in the heart and kidneys. These drugs are indicated for the treatment of
supraventricular tachycardias and PVCs.
class II antiarrhythmics
____ is indicated for initiation of treatment and prophylaxis of frequently recurring ventricular fibrillation and hemodynamically unstable ventricular tachycardia in patients refractory to
other therapy.
Amiodarone HCl injection
act by blocking depolarizing currents and thereby prolonging the effective refractory period of the myocardium
CLASS III ANTIARRHYTHMICS
drugs that affect the action potential of cardiac cells and are used to treat arrhythmias and restore normal rate and rhythm
antiarrhythmics
the amount of blood the heart can pump per beat; influenced by the
coordination of cardiac muscle contraction, heart rate, and blood return to the heart
cardiac output
_____ has been associated with a potentially fatal liver toxicity, ocular abnormalities, and the development of very serious cardiac arrhythmias
Amiodarone
The _____ block potassium channels and slow the outward
movement of potassium during phase 3 of the action potential, prolonging it. All of these drugs are proarrhythmic and have the potential of inducing
arrhythmias.
class III antiarrhythmics
are slow non-dihydropyridine calcium channel blockers
CLASS IV ANTIARRHYTHMICS