A hiatal hernia can cause or exacerbate a heart disorder. And an increase size of the heart may contrbute to the crowding out effect. The chest cavity has a compact, limited space and an enlargement can have an effect on the other organs. There are congenitalyl deformed chest cavity condition, rib cage, etc. that can cause chf.
A hiatal hernia can crowd the chest area giving the lungs less room to work. Eating smaller meals can help since a full stomach also crowds the lungs causing increased shortness of breath. Often this is worse with any movement that would cause you to bend forward at the waist since it further crowds your lungs into a smaller space.
http://www.medhelp.org/posts/Respiratory-Disorders/Can-a-Hiatal-Hernia-cause-asthma-like-symptoms/show/283455
Regarding constipation can be due to a hernia as digestive organs are impacted. With a hiatal hernia, part of the stomach protrudes upward through the opening at the esophagus and the diaphragm. The stomach is normally located in the abdomen.
If I understand your question, I have never heard of treatment for heart disease causing the scenario you have asked.