In the past, an irregular heart rhythm was treated by using a drug to regulate the beat. there is a treatment that can also regulate heart rhythms that has replaced drugs in some cases. what is that treatment?
a. pacemaker
b. angioplasty
c. clot-dissolving drugs
d. myocardial infarction

The correct answer would be a. pacemaker.

A pacemaker is a medical device implanted in a chest or abdomen of a person suffering from arrhythmias (irregular heart rate; too fast, too slow, or irregular rhythm).

It is used in monitoring and maintaining a heart rate of a person.

It consists of a computerized generator, battery, and wires with sensors.

If an abnormal rhythm is detected by a device, it generates electrical impulses which help in contraction of heart muscles and thus, help in regulating the electrical conduction system of a heart.

The correct answer would be a. pacemaker.

A pacemaker is a medical device implanted in a chest or abdomen of a person suffering from arrhythmias (irregular heart rate; too fast, too slow, or irregular rhythm).

It is used in monitoring and maintaining a heart rate of a person.

It consists of a computerized generator, battery, and wires with sensors.

If an abnormal rhythm is detected by a device, it generates electrical impulses which help in contraction of heart muscles and thus, help in regulating the electrical conduction system of a heart.

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explanation:

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"menstrual cycle is a complex cycle that consists of several processes. order of occurrence of steps in menstrual cycle are as follows:

1. high progesterone levels maintain the endometrium lining of the uterus.

2. endometrium lining breaks down and low levels of estrogen stimulate the pituitary to release fsh and lh.

3. fsh and lh stimulates the follicles to develop and the oocyte to produce estrogen.

4. rising estrogen levels suppress fsh production and development of other follicles.

5. a spike in lh causes follicle to rupture.

6. a breakdown of corpus luteum causes progesterone level to drop."