dealing with blood pressure issues,为动名词做方式状语，end up (by) doing something 为英语习语，意思是“以做什么而告终”。by经常省略。例如：The party ended up singing. 晚会以唱歌而结束。but also deal with either a heart murmur or heart arrhythmia.和end up功能相同，做定语从句的并列谓语。

When it comes to like a family and a gene perspective, it's possible that within your family there might be multiple men who end up at a later age dealing with blood pressure issues, but also deal with either a heart murmur or heart arrhythmia.

第一种理解：前面dealing with blood pressure issues为现在分词后置定语，后面deal with either a heart murmur or heart arrhythmia动词原形end up为并列谓语

第二种理解，有人会认为是end up doing sth这个结构，但是我认为这种理解不妥当，因为后面有出现deal with动词原形结构，如果后也是dealing with，则可以按照end up doing 这个结构来理解。

end up = 以…结束; 最终成为变得; 最后处于;最后发展成为

后面可以接动名词,形容词,和介词短语

(1)end up +形容词 以某种状态结束

If he carries on driving like that, he'll end up dead.

他照这样开车,早晚得死于非命。

(2)end up doing sth 以做某事而结束

You could end up running this company if you play your cards right.
你要是处理得当，到头来这个公司能归你掌管。

The party ended up with the singing of Auld Lang Syne.
宴会以《友谊地久天长》的歌声而告终。

All our best intentions end up doing nothing.  

我们最好的愿望(减肥成功)往往都会落空.

(3)end up +介词短语(in/with/as)

A: end up in 侧重于以某种结果结束

Wasteful people usually end up in debt.
挥霍浪费者最后往往负债。

If you keep doing so, you'll end up in hospital. 

如果你继续这样做，你最终会生病住院的。

If you persist in doing that you will end up in trouble. 

你要坚持做那件事的话，将来麻烦可多着呢。

B:end up with 侧重于以某种方式结束

The meeting ended up with a song.

会议以一首歌曲结束了。

The weakest students can end up with a negative score.  

最差的学生可能会以负分收场。

They could end up with a 50-point winning margin.  

他们最终可能会以50分的优势获胜。

C:end up as 侧重于以某种身份/结局结束

He will end up as president someday.  

他有朝一日能成为总统.

Tears and smiles all end up as laughing stocks.  

哭笑都是人们开心的笑柄.

They have managed to end up as partners in their new business.  

他们最终成为了他们新业务的合作人.

If we reuse something, it will not end up as waste.  

如果我们重复使用一件东西, 最终它就不会成为废物.

A banking - turned - sovereign debt crisis could yet end up as anotherbanking crisis.  

一场银行业危机转化成的主权债务危机,最终有可能成为另一场银行业危机.

下面句子就属于：end up doing sth结构进行理解

When it comes to like a family and a gene perspective, it's possible that within your family there might be multiple men who end up at a later age dealing with blood pressure issues, but also dealing with either a heart murmur or heart arrhythmia.

=When it comes to like a family and a gene perspective, it's possible that within your family there might be multiple men who end up dealing with blood pressure issues at a later age, but also (end up省略了 )dealing with either a heart murmur or heart arrhythmia.

以上2个动名词属于平行，并列作end up doing sth ,but also doing sth, 英语讲解对称和平行。

(1) end up dealing with blood pressure issues at a later age(而且前面省略not only...与后半句but also..形成对称）

(2)(end up省略了 )dealing with either a heart murmur or heart arrhythmia.

以上2个属于并列并行，而且具有高度对称性。符合英语语言讲究对称的特点。

不知道提问者是否抄错了句子，请提问原文出处，以便获得统一正确解答观点。