Inotropic vs. Dromotropic

Main Difference

The difference between inotropic, and dromotropic is that inotropic is a cardiac drug that affects cardiac contraction, whereas dromotropic is a cardiac drug that affects conducting tissues of the heart.

Difference Between Inotropic and Dromotropic

Comparison Chart

Inotropic vs. Dromotropic

There are many types of cardiac drugs, inotropic, chronotropic and dromotropic are the types of cardiac medications. There are many cardiac problems, and each medicine is made for a specific kind of cardiac problem. The inotropic cardiac drug is used to treat cardiac contractions; whereas dromotropic is a cardiac drug works on conducting tissues of the heart. If we talk about Inotropic, there are two types of inotropic drugs. The positive inotropic drug increases the force of myocardial contraction whereas negative inotropic drug decreases the force of myocardial contraction. If we talk about cardiac dromotropic medicines again, there are two types of cardiac dromotropic medicines, a positive dromotropic cardiac drug that increases the rate of conduction on the other hand negative dromotropic cardiac drug slows down the pace of conduction. The difference between these two drugs is by their function in our body.

What is Inotropic?

There is a force that is always applied to the muscles on heart and Inotropic is a cardiac drug that controls that force of muscles on the heart. Our heart undergoes contractions, and these contractions are also controlled by Inotropic. There are two types of inotropic cardiac drugs that are positive inotropic drug and negative inotropic drugs. The functions of both positive inotropic and negative inotropic drug are different, positive inotropic drug increase the muscle contraction whereas negative inotropic drug decreases the muscle contraction. Myocardial contractility is a process that controls the contraction of heart muscles. If we talk about the benefits of the inotropic cardiac drug, one of the main advantages of this drug is to control muscle contraction. The use of positive and negative inotropic drugs depends on the condition of the patient. Positive inotropic cardiac drug and negative inotropic cardiac drugs have different functions and use. The use of both depends on the condition of the patient.

• Positive Inotropic Drug: Positive inotropic drug increase the rate of heart contractions, an increase of heart contraction mean pump more amount of blood to the heart in a few heartbeats. A patient who faces a heart attack is treated with this drug. This drug is best for a patient with cardiomyopathy.
• Negative Inotropic Drug: Negative Inotropic drug slows down the contraction of the heart. Patients with high blood pressure are treated with a negative inotropic drug. Basically, this drug deals with hypertension.

What is Dromotropic?

Dromotropic is a cardiac drug that affects conducting tissues of the heart. Dromotropic improves the condition of heart impulse. Dromo word means long distance. There are two types of dromotropic cardiac drug that are positive dromotropic cardiac drug and negative dromotropic cardiac drug. The positive dromotropic cardiac drug increases the electric impulse conduction whereas negative dromotropic cardiac drug decreases the electrical impulse conduction. An example of positive dromotropic is phenytoin, an example of negative dromotropic is verapamil. These drugs are given according to the condition of the patient.